@matigo if you use any "free" service, you are going to be monetized. That's just reality. If you're seriously considering using Facebook again, it's worth understanding what you think you are missing by not being on Facebook.
My kids have mostly come to the conclusion that social media is a waste of time. My daughter, after a recent incident where a student at our local high school was arrested for what he posted on social media, decided it wasn't worth participating. My son only rarely uses Twitter.
Maybe they have a point. :P