F2P Game with Cash Rewards

Does anyone know what are the considerations / requirements of Apple Store to offering cash rewards to users for a free to play game (i.e., not a betting / gambling licensed app)?

Our game does not involve real money transactions. We have consulted legal experts who have confirmed that we do not fall under the category of a betting or gambling company, as users are not required to make any payments to enter our competitions.

The only requirement to enter to the cash rewarded competitions is to have an in-game asset that you get in the F2P competitions or buy this in-game asset in the store. The cash rewards we offer are distributed solely based on performance in the competitions.