I’m a big privacy and FOSS advocate so my list is kinda long, but the main ones are:

-> Google (I use GrapheneOS)

-> TikTok

-> Tesla (too much data collection)

-> Microsoft (self explanatory, however for some things I need to keep an w10 LTSC VM configured)

-> Adobe (same reasons as Michaelsoft)

-> OpenAI (same reasons as Michaelsoft, but I do use it inside a vm in no-account mode for some work related things)

-> Uber (oh man that app is digital herpes)

-> Spotify

-> Facebook/Meta

-> Dropbox

-> Whatsapp

RedLib and Invidious hoster here;

I can confirm they do not use any backend API, however this means eventually they (YouTube and Reddit) kick on automatic rate limiting after a while and I have to switch up my vpn connection on my server. it’s annoying, but it works if you know a thing or two about proxies and web scraping (the knowledge from scraping can be cross applied to implementing a suitable proxy config)

that said, RedLib’s backend token spoofing works a lot better than the Invidious method (Invidious emulates web traffic via Android mobile devices and gets the videos from Google Videos directly, bypassing YouTube for the heavy lifting).