They've taken a long time to dial in for me. Initially, I received none, then ads that assumed I was female (I had my gender unset, but generally followed/liked fairly male things; yet received ads for menstruation underwear!), then ads that assumed I was Russian (I'm nowhere near Russia and can't speak/read any Russian; I follow one person who has a Russian background, but never interact with them). I've been on there for years and speak pretty openly about the things I like (travel, cooking, etc) - surprised it took so long to give me relevant ads!