Pro players won't like it because their overall profit will always be reduced because when you use directbet's platform you always have to pay for miner fees everytime you bet. Let's say you bet once a day with the fees set to regular ranging from 0.0002 to 0.0004 after a year you already wasted 0.075btc to 0.146btc max. If you're betting with an account you could've saved so much.