From Blaseball Wiki
Non-Profit is a Modification that causes a player to not give any payout for Idol Snacks to Fans on their own team.
Players with Non-Profit do not pay out any coins for Fans of their own team when Idoled by them.
As of the end of the Expansion Era the only time the Non-Proft modification has been seen was with Parker MacMillan in the ULB where in the Season A Election the Hawai'i Fridays Hexed MacMillan with the Non-Profit modification.
The only time the modification has been seen activating is in the Library book "An Exile":
You earned 0 Coins from Parker MacMillan hitting a grand slam!
You earned 0 Coins from Parker MacMillan hitting 2 home runs!
You earned 0 Coins from Parker MacMillan hitting a three-run home run!