I've always figured that these are the lowest common denominator form of ads. "Since we have no idea of who you are, this is the drek that targeted to you -- i

I've always figured that these are the lowest common denominator form of ads. "Since we have no idea of who you are, this is the drek that targeted to you -- i.e. 'everybody'". This is also the reason I don't log in to YouTube, and if I do find I video, I open it in a "private tab". If I don't suddenly my "feed" explodes with even more stuff I was barely interested in when I wanted to watch the video in the first place. Never let it know you might be casually interested in anything borderline controversial, or you'll be overwhelmed with every fringe dingbat clickbait video that's, perchance, even barely related to the video you watched.