Not a lot as I've not been paying any attention to steem other than transferring my steem to hive every week.
Having a little look now though. It actually is a pretty good engagement idea. Everyday being in a question/topic/contest etc. It's a good way to get engagement going and also get rewards for participating.
To be far I'm surprised we don't have a 100 days of Hive just to 1up them and do it better.