Facebook is terrible for this. I thought I'd opted out of all communications, yet I still receive these enticer emails and also things about how my "business page" needs updating.

The only reason I still have a Facebook account is "in case" I ever need to contact some of those old associates or school friends (a bit like hoarding old computer parts - I might need them one day!). I still have a LinkedIn account because I changed industry and thought I should at least have some way of contacting old business associates if I ever needed a way back.

Otherwise, I'd have deleted both accounts. They are of no practical use to me on a day to day basis, and I only hold on to them for a "just in case I need to contact someone" situation.