Hard pass. Blockchain and Gambling still don't really go together yet. Moreover, I wouldn't touch anything intersecting this space that doesn't have Rick Dudley directly involved. Not only does he have a 15 year headstart working on some of these problems, but he also owns patents on provably fair online gaming systems. The site acts like the main challenges are legal when really they're technical.
Have you actually looked at Augur? It is up and running and working well.
In a very narrowly defined space, it is something that works, yes, but as always with tech in this space "there be dragons".
As a side note, I stg that every "new thing" built on ethereum is just a chain of underpants gnome logic. Except the "???" is something you can drive a star system through.