RE: How much of the rewards pool has been 'drained' by SteemSports?
Honestly, when I show my friends the steemit platform and how it works. One of the best and easiest selling points is to show them how steemsports works, because they say something along the lines of:
Free Money for picking who wins?
I reply yes, then I help them sign up for steemit. So I don't see the bad part here. @steemsports def brings more people to the platform than turns them away and I think it is a cool idea. So what if the people who write it and do all the work keep some of the rewards pool, if that bothers you don't take part and do your own thing.