That doesn't make sense to me. Why do you not trust sites running targeted ads?
It depends: targeted advertising makes me thing about giants like Google, who build profiles based on your browsing habits and everything they know about you. I wouldn't like it if Bitcointalk starts using Adwords, even though I'm okay with it on for instance a car forum. I care more about my privacy in relation to crypto than other subjects.
Someone who regularly views, but doesn't post in the gambling sub would probably be interested in ads for a casino, while someone who posts in the altcoin sub might be more interested in an exchange.
I'd be totally okay with advertising targeting only certain boards. Most gambling signature campaigns have special requirements for the gambling board too.
Your post history is no secret. The forum is already
collecting enough information to serve targeted ads, but for some unknown reason is not doing anything with the data it is collecting on its users.
If I have to guess, it's because the forum's mission:
he forum's mission to be as free as possible.