We recently mentioned Tweetro, the new Windows 8 Twitter app for two reasons -- (1) we had a video tour at BUILD and (2) the app had to be pulled due to it being too popular. That latter part has to do with Twitter's new API changes and limits on how many people can use a third-party Twitter app. Needless to say, it's putting the crunch on Twitter devs. And it means they'll likely have to charge a pretty penny for their wares. Yes, Tweetro is back. But it'll cost you.