There are so many coins, but many of them just a copy of anothers. Why they waste their time for nothing?
Maybe they see potentional to earn a lot of money by creating ICOs.
Or they just have free time and they are cryptocurrency enthusiast.
It is not enough to be a crypto enthusiast to run ico, you need to know people who know how to write smart contracts, make some kind of website, and get confused with the project, which is very difficult. The most important thing is to have a cool idea, even if borrowed