I cannot recall ever buying anything from any ad targeted at me through a website I visit. Am I a unique snowflake in that the AI always guesses wrong for just me, or is AI based advertising simply a total failure?

I have bought many things from ads related to the media I am reading. For example, I read muscle car magazines, and buy parts/tools from the ads in those magazines. Back in the era of print mags, my company would do well placing ads for compilers next to relevant programming articles.