If it takes off and is successful on a massive scale, I'm sure they will find a method to monetize it other than transaction fees on donations. One example that

If it takes off and is successful on a massive scale, I'm sure they will find a method to monetize it other than transaction fees on donations. One example that I can think of off the top of my head is to charge medical device manufacturers or pharmaceutical companies a fee to market their products the recently funded with direct messages or traditional advertising.