Part from personal experience with some ads and part from talking to people who have a lot of prejudice towards crypto... Also some comments on reddit posts too regarding crypto... If you start straight with "post, comment and earn", first thoughts of an average web2 person: earning fiat would be too easy, rule 1: no one gives money for free, (if it's a boomer will just directly think a scam and skip), at that point if he hasn't skip already and it's not fiat he will most likely assume is crypto, at that point you lose already other people because crypto=scam... This is why you absolutely need first a familiar face, someone famous, so scam is immediately removed from the viewer mind because no one famous would advertise a scam, and second not straight to "oh post and earn" but do a little round like in the example i wrote above, so it's less direct and more curious
Human psychology that's it, predictable 😄