I'm sure this wasn't 'inspired' by twitpay.me at all, released and announced here 15 days ago ( http://news.ycombinator.com/item?id=369568 )
Putting aside the sarcasm and assuming it was inspired by twitpay, what exactly is the problem with that? Unless you also have a patented technology, being first to market doesn't really matter. Execution matters. Bragging rights don't pay the bills.
TipJoy is a social platform for tipping people, that now has a Twitter hook.
Twitpay is a payments platform built exclusively on Twitter, with some other interesting features in the works.
It seems like overlap, but we're in pretty different spaces. I wish the discussion here had focused on TipJoy, and not veered off into this side of things...although I'm happy people know about Twitpay, too. We'll have our own HN threads for cool announcements soon enough.
Congrats to Ivan and Abby for getting this out there.