Yeah, it would cost something the token creator, but if there is a lot of miners, and people don't receive rewards in a longer timeframe, it can be demotivating and provoke token sell...
So, with miners' supply growth, the creation of this kind of pool can be interesting for both, token (miners) creators and investors...
Cheers!
I totally agree with you. The more miners are sold, the more it makes sense to make these pools. Otherwise at a certain point, nobody will want these miners anymore.