They have a rewards system on top of the zaps
Fountain has rewards on top of zaps 
Stacker News has rewards on top of zaps 

They're all becoming more interoperable, and it'll become more seamless to take advantage of all three rewards platforms plus zaps with one post.

The UI/UX is clean and they have some "big" feature coming out in a couple of days. 

They gave a solid presentation at pleblab too 

https://www.youtube.com/watch?v=7sLJ1EkrLt8

.......and I'm not affiliated or anything.