Personally I don't believe in these gambling platforms based on the block-chain. In general, they do not suggest anything new and most of them die after ICO.
Unless you already have a working platform with established partnership like GRON.
Get acquainted with the WP, you'll understand what makes Gron Digital different from other Gambling platforms. For one Gron has been working on this project since 2012, funding itself rather than waiting for public backing like other projects do and plans to use its own cryptocurrency for betting in a secure and transparent way.