I don't know how they feel but if they're popping champaign bottles after abandoning their product and their users then I don't give a shit how they feel.

I do understand the situation better than most however because I've been there in a startup when the end is there and you're faced with acquisition to hire talent or closing the doors. You face it every day as time runs out and your runway shrinks. You face it a thousand times until you finally make a decision you were avoiding for a long time. It's not fun. So if these guys are happy it's probably because a weight has been lifted of their chest, not because they succeeded.