I’m sorry to hear about your poor experience with them, but these are standard terms and conditions I believe… So long as you are still promoting them there shouldn’t be an issue.
As an aside, Bet365 are the quickest to pay my affiliate earnings to me as an Australian. Most pay before the 15th day of the month but one Australian (well, no longer Australian any longer) company makes me wait 20 business days before they pay me, this means during February and months with several public holidays that I don’t get paid for the previous months earnings until the next month starts!
I’ve never understood why that was necessary and it can be quite annoying at times.