Unfortunately a big bulk of the data they profit off of is simply the ads and on-platform communication and behavior. Doesn't really matter if you use a different device if you still use the platform. Sure, it's slightly better, but it really isn't a silver bullet if you're still using it. And this is coming from someone who does this already.
I don't really mind if they make a profit off of the free things I use.
What I mind is when my personal life, the stuff that _actually_ matters, is being monitored or has a backdoor that allows ANY third party easy access to monitor it.