i believe they also bought vimeo and livestream.com, and proceeded to miss the boat where Youtube took off.

Vimeo was part of CollegeHumor.

Vimeo was bought by Bending Spoons.

https://news.ycombinator.com/item?id=45197302

That was after IAC:

"Additional acquisitions in 2006 included ShoeBuy.com,[46] which the company later sold to Jet,[47] and Connected Ventures including CollegeHumor and Vimeo".