Please seriously consider *not* using ads to generate revenue. We need to return to other models rather than just slapping ads on everything. Be the change you want to see in the world. Do you really want to see more ads?
Have a look at https://examine.com as the closest site I can think of in this space, and check out their revenue models.
Have a look at https://examine.com as the closest site I can think of in this space, and check out their revenue models.