This is actually pretty insightful! Being a Patriots fan, I'm well aware of the pace of 3 of the 4 games you share, as well as the last Chiefs win. The quality of the game seems to negatively impact earnings, but only in terms of "come back victories". The game against the Rams was a great game, with a defensive showcase, but even with the home team playing, it wasn't enough to distract the locals.

Without the first game, it would seem consistent that you make a bit more during and shortly after the game. (Perhaps "winnings" by bettors?) Perhaps someone won big in 2018?

Regardless, you obviously upped your earnings each year, which is commendable for anyone. =) Keep it up, and Go Patriots! =)