When you have a lot of fans, missions no longer reward as they state.
All missions pay the same as the first mission, even if they state they will pay higher.
This is why the math is off for larger accounts and they can no longer do missions.
The ego goes up for each mission but the reward does not adjust, by the fourth mission on the list you are running pure loss.
Here is the fourth island with ~45,000,000 fans and 0% ego:
I hope the info was gained and this experiment can be done soon. I miss running missions and I don't understand how the game is meant to be played like this. 5 out of 8 missions on the current island don't make sense to run.