Advertising comes down to a) Does your content attact/have a sizeable audience, i.e. eyeballs/traffic/members; b) What is the demographic of those eyeballs?; and, c) What is the reason those demographically targetted eyeballs are viewing your content?
If you have a-c you can do anything and everything to sell, market, advertise, evangelize, generate leads, whatever you please . . so long as the presence of the revenue producing activity does not turn off or turn away your audience.