I have specifically gone out of my way to maintain a grease monkey script that hides all sorts of things from Facebook. Ads, yes, but also all the other “people you may know”, “suggested for you” and other garbage. It has substantially reduced the time I spend on Facebook, because it’s a lot harder for me to get sucked in, while still allowing me to see the things my actual friends are posting, rather than a post from a company that my friend liked.