Thanks a lot for your question! We have published an article "Seven sides of This Coin Rocks blockchain game motivators explained" that may answer it:
Please let us know what you think.
To address your question on possible number of players - it can be quite large. Just look at the recent binance community voting. Almost 250k people participated in the 6th session https://www.binance.com/vote.html
This is the primary reason why we picked EOS as the blockchain software of the future for its incredible scalability and 500 ms Block Interval https://medium.com/eosio/eosio-dawn-3-0-now-available-49a3b99242d7
RE: Please help us with your feedback on EOS Blockchain game idea