It's not just creepy data gathering. It's specific, targeted emotional manipulation. Facebook runs "experiments" on its users to intentionally make them feel sad or depressed. They publish these works, proud of their accomplishments, and tell us that we agreed to be emotionally manipulated into a dark depression because we agreed to the Terms of Service when we signed up. Facebook believes you gave them your informed consent to fuck with your emotions because they believe you read their TOS and they believe it is morally okay to do stuff like this.

No, it's not worth those warm fuzzy feelings you get, because half the time it won't be warm and fuzzy but actually, it will be a depression that Facebook intentionally put you into, just to see if it could.

Facebook is not worth it. Email lets you stay in touch just fine.