$20 is a valid price given the user token situation. Tapbots will not reach the cap at the $20 price range and I expect the price to steadily drop as sales drop off. This way, rather than getting $10 x 100000, they're getting $20 x 1000 + $10 x 50000, etc.

Personally, I'm not ready to buy yet. I paid $3 and $5 for Tweetbot for iPhone and iPad and I'm happy with the value they provide me. Does Tweetbot/Mac offer more (and 4-6x more) value than the iOS versions? Probably not to me and not to a lot of other people.

That said, it's dangerous to use price as a way to protest the user token limit. You're hearing people complain about the price rather than complain about the user token limit that resulted in the price. And it gives Twitter ammo to point back to Tweetbot and say, "See, it is still possible to make money from clients despite the token limit!"

It may have been better to cap out early and have people complain that the app has been pulled, but that would result in sacrificing the product for the cause.