The first one (eBTC) was maybe an interesting project. Now however it's just become ridiculous, look at the first page of the Announcements! It's nothing but these e coins, sometimes with 2 or 3 versions of the same coin being given out by accounts with only 1 post. They hold onto some coins, give the rest to a bunch of other randoms to get a market going on etherdelta, then they dump their coins for some free ether.

There's a couple satirical projects using this scheme that have come out recently which are pretty funny, but that's the maximum amount of value being generated by these projects, just a couple good jokes.

Honestly if I wasn't so lazy I would do it, hopefully this fizzles out soon though.