First of all sometimes it does. I can't make a better hypothesis because there is no previous studies of any kind. The hypothesis can be wrong it's not really important, what's important is to start experimenting on the matter instead of just debating whether or not it has an impact. It's not that random anyway, when you think about it the game manual suggests that PRMs have indeed a direct impact on merchandising, yet we can't put a figure on it.
Public Relations Managers help market the team to the fans, encouraging more people to show up to games and be willing to pay more for tickets
We know it does affect affluence, but we don't know if it's profitable (is the salary compensated by the extra affluence?). Anyway I was replying just to inform everybody that maybe I'll know a little more about PRMs at the end of the season, maybe not, at least I tried. But I agree with you, the results could be proven totaly irrelevant at the end.