Really? Facebook, while not the worst or most tasteless ads, are overwhelmingly scammy in my feed.*
"Going out of business" sales for fast fashion websites only a month old. Crowdfunding projects which obviously are just clones other products. Items with a slick video which if you buy them from any other place, they cost half to a third the price.
*last I used Facebook for any significant amount of time, which has been a while.