This all comes from the belief that, with few exceptions, the only way citizens/consumers should affect companies operating in their countries is through purcha

This all comes from the belief that, with few exceptions, the only way citizens/consumers should affect companies operating in their countries is through purchasing decisions. United we stand, divided we fall, and all that. Even for less hilariously monopolistic situations than ISP choice, this is tricky, due to the massive information asymmetry. Not to mention it rewards the less than idealistic - corporations have no qualms against buying politicians to advance laws favourable to themselves.