We're starting to see changes to Twitter and Twitter clients following the announcement of new API rules. Late yesterday, Tapbots pulled the alpha version of Tweetbot for Mac. Paul Haddad explained that the company tried to work with Twitter to get around the user token limit during the beta-testing period. Twitter didn't find any solution acceptable, Haddad said, so the public alpha download was pulled. Those who already have the alpha client are still able to use it.
Haddad assured users that the final version Tweetbot for Mac will be available in the near future. He also urged those who tried the alpha and decided not to use it to revoke access and up the user token.
Meanwhile, The Next Web points out that Twitter no longer identified which client was used to post a tweet.