Crack open the DMG and direct his attention to page 7:
"The last essential part of a D&D game is fun. It's not the DM's job to entertain the players and make sure they have fun. Every person playing the game is responsible for the fun of the game."
Quite simply, if his actions are making the...
"Donationware is computer software given away under the condition that anyone using the software make a donation to the authors or to some third party such as a charity. Because the donation is optional, donationware may also be freeware or fall into some other category."...