This is one big fraud. It charge only small amounts, but every bigger amount like 100-200e is not charged, and after every shopping like clothes, electronic etc. I have to contact support, but usually without success. "We don't have your cashback, so what?". Additionally, cashback is not charged on Booking if you are in Genius program, but there is no information about that in terms and conditions.

@katarzynamos: The information that you can either use Opera Cashback or Genius is a statement of Opera's official support, I can send you this email, I still have it. Thanks for the advices, but don't you find it a bit strange that for each transaction over 100e I "forgot" to activate the cashback, but cheaper transactions are always credited very quickly? Dozens of proper transactions over 100e were not charged on my account, and sending emails with bills, screenshots etc. doesn't help, Opera's support just doesn't respond. So yes, this is cheating and tricking people.

This is one big fraud. It charge only small amounts, but every bigger amount like 100-200e is not charged, and after every shopping like clothes, electronic etc. I have to contact support, but usually without success. "We don't have your cashback, so what?". Additionally, cashback is not charged on Booking if you are in Genius program, but there is no information about that in terms and conditions.