A short while ago, I finished the Nation of Baseball Conquest.
Without worrying about it to any real degree, I finished off the Red Sox and then planned to finish off the 4 more million fans I needed to steal to complete a mini-mission requiring 15 million stolen fans to complete.
The counter resets. I don't know why I'd thought that it might not, possibly because the counter isn't related to the map in any way except one.
There have to be fans of other teams in order to steal said fans. Duh. How very foolish of me.