That may be a piece of it, however I think the key reason is that they tackled the UI issue of decentralized gambling clubs. The normal individual doesn't have the foggiest idea what Scatter or MetaMask are, however he/she might want to play on a gambling club that is 100% reasonable.
Regardless of whether individuals join with email, an EOS account gets matched up with their profile. In this way, everybody who plays it collaborates with the blockchain while never getting the hang of anything about the blockchain.