I would hazard a guess that it will probably earn a couple g's a month for the next 2 years, at which point it'll drop off almost completely with the exception

I would hazard a guess that it will probably earn a couple g's a month for the next 2 years, at which point it'll drop off almost completely with the exception of the occasional impulse purchase. Net earnings over next 3.5 years? <110-195k in total, optimistically. Still decent money for something that's more "fun" than other types of tasks.