So, they aim for max 1.4 million in revenue (100k x $20 - 30% for apple, minus an unknown amount for beta testers) for the lifetime of the app. How many people have worked on it?
It does show the limited upside of twitter apps under the new rules(yes, 1.4 million is still a lot of money, but no home run for a company).
Tokens are per-application. So they do not have "a limit over 100k", they have a limit of 100k on "Tweetbot for Mac". Which is a completely separate limit than the one for Tweetbot on iOS.
In a blog post they said, "Our user cap for Tweetbot for Mac is also large and we don’t expect any problems given the smaller market", which sounds like it's the double-user cap, not 100k.
The Tweetbot for Mac alpha was already out before the limit was announced, I would bet they already had way more than 100k tokens registered at the API limit announcement.
Tapbots has >135,000 twitter followers. They had significant exposure from many other sources too, like Daring Fireball which has >400,000 Mac + Twitter using RSS subscribers.
Early adopters are more likely to have multiple twitter accounts as well, so they would have already registered multiple tokens.
It does show the limited upside of twitter apps under the new rules(yes, 1.4 million is still a lot of money, but no home run for a company).