you wouldnt know if a user is really used your link to bet and you wouldnt know if they really wager a certain amount of coins as directbet's affiliate system dont show which user gave you a commision and which user made a bet on this and that
They will have to post bets in their post and if it counts a total of their earning pack, they will be paid.
There is any escrow to hold the prize?
I am paying the commission i receive, so no escrow as i am not directly paying something from my own side.
As per the VIP Reward, you can claim it once you reach the wager amount.