I mainly use iOS devices and avoid YouTube on my phone, so I don't use this app. I don't pay for Premium though, and I won't because Google is a monopolist and their entire business is built around the pernicious use of data and advertising. I use uBlock which takes care of the ads on desktop, and don't see it as immoral to freeride in this situation. I do pay for plenty of similarly situated services where the agreement is a much more clear "money for goods and services" type arrangement.