Sure for major artists pulling in millions a year, but at that point fuck em. For indy and unsigned artists, directly buying their media goes basically straight to them and is usually the highest margin item they have. If they are a massive artist sure their merch has economy of scale setup and they rake in money through that but I don't support massive wealth inequality so they can fuck right off.
You can also get grayjay, which will also condense twitch, nebula, youtube, etc into one consistent feed without trackers or ads. Also it supports the down vote plug-in and 3rd party comment solutions so you can get even more from the app then you can with say revanced which is just the regular old YouTube app with patches.