The question is, what makes a social network “take off” the populace or the ad revenue?
Lets build a sign in the middle of the field for advertising vs Lets build a billboard on the major highway right before the exit they need to take. No ads are ever built in isolation
Thus, ad revenue follows eyeballs and not vice versa. I think a good example of this is the explosion of individual content creators beginning to pull ad revenue away from MSM.