If you are speaking about the past years this simply isn't factual. PoS coins have almost all proven to be ICO scams or pump and dump opportunities.
This is true. I wondered if most ICO scams choose PoS variants because they cannot easily get network backing using PoW?
My guess would be that PoS is a useful "buzz word" that few people have actually researched, but that seems to be really cool.
Marketing 101.

It's one of the reasons I am glad research that is verifiable is finally being done. It's a lot harder to make claims when there are verifiable counter arguments around.