So we have the slippery slope argument and the "it's not optional" arguments. The slippery slope is in fact a logical fallacy. The "it's not optional" argument, while not a true fallacy, is simply you choosing to do something. It's your choice to do an optional thing. Not having that option is what takes the choice away. Ancient Romans didn't have the option of driving a car to work, they rode horses or walked. You could walk or ride a horse too. If you instead choose to drive to work, it's because you have decided it is cost-effective to do so. If you choose to watch an ad, it's because you have decided it's worth your time to do so. Therefore you are benefiting from the existence of ads. Basic economics.