7 years from today, what occurred; 1) Twetch dead, Twitter …

7 years from today, what occurred;
1) Twetch dead, Twitter alive as is?
2) Twitter buys Twetch but Twitter remains as is, Twetch dead?
3) Twitter buys Twetch and fully morphs into Twetch?
4) Twetch kills off Twitter?

I’m thinking 3) will be most likely.