Yeah, AFAIK wager requirements should be the same, there is no difference. But maybe that's platform's policy, since there is no OP reply regarding this matter so I'm just guessing. Honestly I'm also confused, because I often see or play in promo bonus gambling like this they impose the same wagering requirements whatever any game 3rd party provider the gambler play. @DroomieChikito or other users I hope they successfully complete challenge wager and the wager doesn't increase like me. Just guess I think its some kind bug of with that auto reset while playing in other 3rd party apps, if so then Blizz.io team should fix it, because it's not funny if it happens to gamblers who make a deposit to get a 100% bonus with increased wager like this.
I'm so curious so I decided to create a throw away account to check about this bonus. I got the same bonus $8 and the required wagering amount is $320, the same as Droomie.

I'm not going to use it though as I'm curious only to know the reason why your wagering requirement is more than 10x bigger than others while we received the same bonus. Anyway, did you make a deposit and take their 100% bonus or you play with the $8 bonus only? It does not make sense at all if your wagering requirement is $3751 if you do not take any other bonus.