docs: add Bounty Program Rules

BOUNTY_PROGRAM.md

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+# AsyncAPI Bounty Program
+
+
+Only individuals and sole proprietors in person (no legal entities or subcontractors) are eligible to participate in the Bounty Program.
+
+If Bounty Program Participant submits invoice expenses for more than $600 USD per calendar year to a Collective at OpenCollective with a Fiscal Host in the US ([AsyncAPI](https://opencollective.com/asyncapi) fits this description), she or he will be asked to fill out an IRS tax information form, which will be either a `W-8BEN` or a `W-8BEN-E` depending on whether the Bounty Program Participant is an individual or a sole proprietor, supplying a local tax ID.
+
+
+## Budget
+
+The budget of the Bounty Program per calendar year is twenty thousand US dollars 00 cents (USD 20,000.00), which is five thousand US dollars 00 cents (USD 5,000.00) per calendar quarter (three calendar months).
+
+Reward for Bounty Issue of Complexity Level `Medium` is two hundred US dollars 00 cents (USD 200.00).
+
+Reward for Bounty Issue of Complexity Level `Advanced` is four hundred US dollars 00 cents (USD 400.00).
+
+Approximate quantity of Bounty Issues per calendar quarter varies from thirteen to twenty five (from ((12 * 400) + (1 * 200)) to (25 * 200)).
+
+
+## Prioritization of participants
+
+Bounty Program Participants are prioritized in the following order:
+
+1. AsyncAPI maintainers (from any repository)
+
+2. Regular contributors (GitHub users who have three or more Pull Requests merged throughout the AsyncAPI GitHub organization)
+
+3. Other (if a GitHub user doesn't fall under the above, the maintainer can determine the criteria i. e. regular volunteers, etc)
+
+
+## Bounty Issues' numbering
+
+To ensure ease of referencing, searching and automation, strictly defined format of Bounty Issues' numbering is used:
+
+1. In submissions of issues for Bounty Program: `[repo]#[issue]` (`cli#38`)
+
+2. In invoice claiming reward: invoice subject `Bounty [repo]#[issue]` (`Bounty cli#38`), tag `bounty`
+
+
+## Submission
+
+Bounty Issues are submitted containing the following five fields:
+
+1. Number: `cli#361`
+
+2. Full GitHub link: https://github.com/asyncapi/cli/issues/361
+
+3. Scope: `We need to extend the functionality of '--version' flag in AsyncAPI CLI to include info about versions of other AsyncAPI libraries used in the project`
+
+4. Complexity: `Medium` | `Advanced`
+
+5. Type: `Coding` | `Docs` | `Design`
+
+
+## Timeline
+
+Start date in Bounty Program is counted from Monday of the next week when assignment of the Bounty Issue on GitHub happened.
+
+Due to asynchronous nature of the AsyncAPI project itself and thus its Bounty Program, UTC offset in Bounty Program Issues' start dates, end dates and weekdays is used. Start dates should be viewed as having addition of `00:00:00 UTC+12:00`. End dates and weekdays should be viewed as having addition of `23:59:59 UTC-12:00`.
+
+For Bounty Issues of Complexity Level `Medium`:
+- Draft Pull Request must be submitted not later than on Friday of second week from the start date and updated on every Friday until submission of Final Pull Request
+- Final Pull Request must be submitted not later than on Friday of fourth week from the start date and merged not later than on Friday of sixth week from the start date
+
+For Bounty Issues of Complexity Level `Advanced`:
+- Draft Pull Request must be submitted not later than on Friday of third week from the start date and updated on every Friday until submission of Final Pull Request
+- Final Pull Request must be submitted not later than on Friday of sixth week from the start date and merged not later than on Friday of eighth week from the start date
+
+If the Bounty Program Participant has not provided a weekly PR update, they are pinged as a reminder to do so.
+In case the Bounty Program Participant still doesn't provide the PR update after three pings over three weeks, it is assumed that the task cannot be completed within the rest of the time, and the Bounty Program Participant has silently dropped the issue. Ban rules are applied to such Bounty Program Participant, and the Bounty Issue becomes free for assignment to another Bounty Program Participant with a reset timeline.
+
+### Example Bounty Program Timeline
+
+| Complexity Level | Assignment date (by GitHub) | Start date (by BP rules) | End date (by BP rules) | Draft PR submission | Final PR submission | Final PR merge |
+|------------------|-----------------------------|--------------------------|------------------------|---------------------|---------------------|----------------|
+| Medium           | 2023-04-27                  | 2023-01-05               | **2023-06-09**             | 2023-05-12          | 2023-05-26          | **2023-06-09**     |
+| Advanced         | 2023-04-26                  | 2023-01-05               | **2023-06-23**             | 2023-05-19          | 2023-06-09          | **2023-06-23**     |
+
+
+## Extension of Bounty Issue's Timeline
+
+In case of absence of the person in charge from the AsyncAPI side, all target dates of the Bounty Issue are increased by duration of absence of the person in charge from the AsyncAPI side + one week. '+ one week' is required because if the person in charge from the AsyncAPI side was absent for a month or two (for any reason), the Bounty Program Participant would then have to spend some time getting back to the insides of the issue and nearly unfamiliar at that time his own code.
+
+In case of unpredicted force majeure circumstances which could not be foreseen and/or are beyond control of both contributor and maintainer, the Bounty Issue Timeline can be increased by a fixed or indefinite amount of time, with a fair explanation in Bounty Issue's or Pull Request's comments.
+
+
+## Constraints
+
+AsyncAPI maintainers are allowed to work on Bounty Issues submitted by themselves.
+
+Bounty Program Participant is allowed to choose up to two Bounty Issues of any Complexity Level for simultaneous delivery.
+
+Doc documenting functionality, which is being covered in the Bounty Issue, should be created, edited, or altered simultaneously with Bounty Issue's resolution, in every situation when it's applicable.
+
+Abuses of edge cases, like one second behind deadline and similar, are not tolerated.
+
+
+## Ban
+
+Should any Bounty Program Participant drop or fail to complete the Bounty Issue assigned to them once, she or he will not be eligible to participate in the Bounty Program during current and next calendar quarter as a penalty.
+
+Dropping or failing to complete the Bounty Issue for the second time will result in permanent ban from participation in the Bounty Program.
+
+
+## Instruction on gaining a Ban
+
+First ask to assign the Bounty Issue to you, _only then_ start to think on the task, understand you can't do it, silently drop.
+
+
+## Instruction on avoiding a Ban
+
+Think on the task, make sure that you understand how to do it and CAN do it, ask to assign the Bounty Issue to you, meet all milestones of the Bounty Issue Timeline.
+
+
+##### This document is the consolidated and formalized version of information publicly available in free form at
+##### https://github.com/orgs/asyncapi/discussions/541#discussioncomment-5462792
+##### https://github.com/orgs/asyncapi/discussions/877#discussioncomment-6970799