like i said, i go by
television viewing audience not by revenue:
yes, of course attendance goes up for playoff games, but in both football and baseball playoffs, the stadium is always sold out. you need to look at how many additional people that couldn't attend in person still cared enough to watch; it's overwhelmingly in favor of football
yes, i think the mlb (and nba, and nhl) should consider reducing the number of regular season games that they play.
yes, college football is regional via the conference structure. what i meant was that even the phillies dont play the pirates very often in baseball and theyre in the same state. michigan plays ohio state every year and its a huge rivalry at a greater distance. also, they do play out of conference games each year, and the bowl games/playoffs/championship games are intentionally designed to have champions and teams from other conferences play each other. (like notre dame (indiana) vs alabama. not sure what you meant about 20 times per year)