diff --git a/README.md b/README.md
index fa6ddb2..f7d428f 100644
--- a/README.md
+++ b/README.md
@@ -56,26 +56,21 @@ import bitlyshortener
 # Setup
 tokens_pool = ['9fbe2864bb8872f5027c103321ff91be90aea687', '0cbe3864bc8872f5027c103321ff91be30aea787']  # Use your own.
 shortener = bitlyshortener.Shortener(tokens=tokens_pool, max_cache_size=256)
-vanity_shortener = bitlyshortener.Shortener(tokens=tokens_pool, max_cache_size=256, vanitize=True)  # vanity=True keeps custom vanity domains when available.
 
 # Shorten to list
 long_urls = ['https://www.amazon.com/gp/product/B07LFJMS2S/', 'https://www.cnn.com/election/2020', 'https://paperswithcode.com/sota']
 shortener.shorten_urls(long_urls)
-['https://j.mp/3jx2gft', 'https://j.mp/31IQt7D', 'https://j.mp/2YNKi01']
-vanity_shortener.shorten_urls(long_urls)
-['https://amzn.to/3jx2gft', 'https://cnn.it/31IQt7D', 'https://j.mp/2YNKi01']
+['https://amzn.to/2HcWFgV', 'https://cnn.it/3ofdpVp', 'https://j.mp/2IHwQ8P']
 
 # Shorten to dict
 long_urls = ['https://news.google.com', 'https://yahoo.com/']
 shortener.shorten_urls_to_dict(long_urls)
-{'https://news.google.com': 'https://j.mp/2TzvYnq', 'https://yahoo.com/': 'https://j.mp/2TCihE4'}
+{'https://news.google.com': 'https://j.mp/31t9qL2', 'https://yahoo.com/': 'https://yhoo.it/3ondJS2'}
 
 # Normalize diverse preexisting Bitly links
 urls = ['http://j.mp/2Bo2LVf', 'http://bit.ly/2BombJQ', 'https://cnn.it/2Ggb2ih', 'https://j.mp/websniffer']
 shortener.shorten_urls(urls)
-['https://j.mp/2BtckCt', 'https://j.mp/2BlS1qw', 'https://j.mp/2TEVtUt', 'https://j.mp/2BmjqbZ']
-vanity_shortener.shorten_urls(urls)
-['https://j.mp/3b9UzJ3', 'https://j.mp/31H7GhP', 'https://cnn.it/2YPARxb', 'https://j.mp/2EKXwDU']
+['https://j.mp/37qFvH0', 'https://j.mp/3obETLt', 'https://cnn.it/2FMI6jc', 'https://j.mp/37FmjFV']
 
 # Show usage for tokens pool (cached for an hour)
 shortener.usage()
@@ -83,7 +78,7 @@ shortener.usage()
 
 # Show cache info
 shortener.cache_info
-{'Shortener._shorten_url': CacheInfo(hits=0, misses=9, maxsize=256, currsize=9)}
+{'Shortener._shorten_url': CacheInfo(hits=4, misses=10, maxsize=128, currsize=10)}
 ```
 
 To obtain the fastest response, URLs must be shortened together in a batch as in the examples above.
diff --git a/bitlyshortener/shortener.py b/bitlyshortener/shortener.py
index 80bffeb..54265cf 100644
--- a/bitlyshortener/shortener.py
+++ b/bitlyshortener/shortener.py
@@ -19,10 +19,9 @@
 class Shortener:
     """Shortener."""
 
-    def __init__(self, *, tokens: List[str], max_cache_size: int = config.DEFAULT_CACHE_SIZE, vanitize: bool = False):
+    def __init__(self, *, tokens: List[str], max_cache_size: int = config.DEFAULT_CACHE_SIZE):
         self._tokens = tokens
         self._max_cache_size = max_cache_size
-        self._vanitize = vanitize
         self._check_args()
         self._tokens = sorted(self._tokens)  # Sorted for subsequent reproducible randomization.
 
@@ -53,11 +52,6 @@ def _check_args(self) -> None:
             raise exc.ArgsError(f"Max cache size must be an integer ≥0, but it is {max_cache_size}.")
         log.debug("Max cache size is %s.", max_cache_size)
 
-        # Check vanitize
-        vanity_status = "enabled" if self._vanitize else "disabled"
-        log.debug("Vanity domains are %s.", vanity_status)
-        # Ref: https://support.bitly.com/hc/en-us/articles/230558107-What-is-a-Custom-Domain-
-
     @staticmethod
     def _check_long_urls(long_urls: List[str]) -> None:
         if not (isinstance(long_urls, list) and all(isinstance(long_url, str) for long_url in long_urls)):
@@ -113,8 +107,7 @@ def _shorten_url(self, long_url: str) -> str:  # pylint: disable=too-many-locals
         long_url = long_url.strip()
         if self._is_known_short_url(long_url):
             # Note: A preexisting Bitly link can use one of many domains, not just j.mp. It can also be
-            # a custom link or not. A custom link cannot be encoded to an integer for caching. Such a link
-            # must be validated and normalized.
+            # a custom link or not. Such a link must be validated and normalized.
             long_url = self._lengthen_url(long_url)
 
         # Provision attempts
@@ -185,7 +178,7 @@ def _shorten_url(self, long_url: str) -> str:  # pylint: disable=too-many-locals
         # Postprocess short URL
         if short_url.startswith("http://"):  # Example: http://citi.us/2FPqsuZ
             short_url = short_url.replace("http://", "https://", 1)
-        if (not self._vanitize) or (self._vanitize and short_url.startswith("https://bit.ly/")):
+        if short_url.startswith("https://bit.ly/"):
             url_id = short_url.rpartition("/")[-1]
             short_url = f"https://j.mp/{url_id}"