I used to wait for ads to appear on my Garena client back in the days when I played DOTA because they were so cool (and useful).
If I know my audience, I don't have to compromise privacy to show useful ads clean and neat either (watertight curation is applied here as well).
Good ads are relevant.
On amazon affiliates:
The iron rule of nature is: You get what you reward for. If you want ants to come, you put sugar on the floor — Charlie Munger
I don't want to reward the wrong type of behavior.