Tongue-in-cheek :
https://www.youtube.com/watch?v=tO5sxLapAtsBut my thought process was that the game is boring. You have to play some boring levels for about a week or two of game play before you rank your character up high enough to be able to play any of the "fun" stuff.
Anyway... my friend likes playing the boring levels and usually will play all of our characters up for us so that we can have high ranking characters with legendary weapons. Mentioned that surely... there must be a way to turn that mindless game clicking into BTC, but so far no takers to my evil plan of global domination (that last part about world rule was also a joke).
No customers yet... but the plan is still young.