I totally understand the need for ads. It sucks but I understand why social media services have it. But I'm just glad I don't have to deal with Reddit's ads on mobile. I don't know if you could personalise them, but I'd get so many weird ads. Like male pattern baldness or erectile dysfunction ads. I mean the gambling ads sucked but I guess I could understand why I was getting them. But the other ones are just... Weird.
And you couldn't even say "not interested" or "doesn't relate". At least with TikTok ads I can tell them that yeah, I'm either not interested or they don't relate to me.