They support one group...and it's not the participants, it's the "developers" trying to pitch their coin that bounty campaigns benefit, that's it! If an up and coming ICO has a great use case it doesn't need people on a forum or people with a twitter account to promote it.
You're completely wrong, I've been in one great projects from very beginning and they didn't promote it as they should and I was even embarrassed to promote it on my own (in my country) but after some time they skyrocketed, if they would employ some clever marketing campaigns from very beginning they would be lot more popular much earlier. Many shitcoins are professionally marketed these days and that's why you think that.