[kissickas]

XX (or is it Dos Equis) and Oldspice would beg to differ, and they didn't even advertise there. I've found reddit to be rather accepting of advertising as long as it is done transparently. IAMAs by celebrities every time they star in a new movie aren't treated with hostility - just put the fact that you're in a new film in the submission text.

There have been many HN posts and comments about successful paid ads in specialized communities.