That is the right way, ads are a legit manner to create incommings if they are contextual, but not if they are abusive and surveillance based, tracking and logging the user activity. As in YT, it's not the problem to have ads in the page or as banner at the border of an video, but it is, that the interrupt an conciert documental with several no scippable long ads, popups to use Premium, clickbaits and other crap, which serve nobody, less the author. In this case using an adblocker is mere selfdefense and legit to cut this crap and nags. A good manner is eg. how Bandcamp do it, there you can freely listen almost every song or album, without ads, and there you can buy and download it when you want, paying direct to the artist and Bandcamp an revenue. Or as Vivaldi does, using afiliate links and search engines added by default, which pay an revenue to Vivaldi, if the user use these, who is free to delete those which he don't use. These and similar methodes are a legit and ethical way to create incommings, without putting in risk the right of privacy of the user, selling his data.