It's also a bit funky they include the deposit amount in the bonus rollover amount even though the rules clearly state: "Bonus must be wagered 50x ( ) before any associated winnings can be withdrawn" . Bonus is bonus, deposit is deposit, they are 2 different things.
If you want a good laugh, even now their bonus terms state that it is 90x bonus and not 90x (bonus+deposit). You may want to hurry for your laugh though, if you decide to look, since they may change it to 90x bonus plus deposit after reading this post: https://nitrowinner.com/en/promotions/promotion/121