You should add this information even on your main post of the promo. I have predicted before about this term because your FS offer is using bigger base bet compared to other FS bonus in other casinos. He won $103 from the FS so he will need to wager more than $30k by his own deposit in order to unlock the the $103 bonus. I dont think he will do it because it is too risky to wager that amount on slot games to get $100 reward. Just suggestion, it will be better if you can offer FS bonus with lower basebet such as $0.1-0.2 but let players complete the wagering requirement by the winning from the FS and give a max amount that can be withdrawn from the FS.