Typically, casino promotion with wagering requirements doesn’t count some bet with low house edge or in his case 1.01 because this is purely not gambling but rather just a bet to claim reward which is not the way promotion was intended. Promotion is to make user engage on gambling by claiming the reward. Casino is a business after all.
To be honest it does not make sense. You give me an option then when I use it you tell me I abused it, it is not allowed. Is it a joke?
If that happen to me then I will be mad and will not think a second to create a flag against the casino.
Rollbit is very aware of it as far as I can remember now. In a thread they talked about it as well.