I run a number of apps and services that don't make a dime. In fact, they cost me thousands. I don't mind.
Monetization is a real pain in the ass, and I stay away from it (for these services).
I have the ability to make a lot of money, if I choose, but that's not much fun. I don't really need the money, and I like having full control of everything I do.
I am regularly approached by folks with monetization ideas. Some, are quite good. Others ... not so much ...
Maybe I 'll pursue something, eventually, but I'm in no hurry.
Thanks for your service. Looks like a great site.