Fixed per app, or fixed per period of time? I.e. does it mean that when I use Tweetbot I'm either a) part of a lucky group of people that authenticated before they "ran out" of tokens, or b) that every time I log in I risk being shut out because too many people authenticated in the last 24h towards their tokens?

I keep recommending everyone to abandon the official apps and use e.g. Tweetbot because the official apps suck compared to 3rd party (commercial messages alone is a dealbreaker) - but do peolpe then take my advice and go download tweetbot only to find they cant auth? That would be bad...