Yeah, there are many platforms for ICO conducting, but ethereum is still the most popular and convenient for developers IMO.
but it is not at all most convenient way for developers specially because of the programming language it uses. and all the bugs that it has. and each time millions of dollars worth of tokens are lost because of these bugs.
they are trying to mitigate the supply part of the supply and demand rule so that maybe they can keep the price up by reducing the sell pressure.