Religion = Income?
When I lived in an isolated town in west Texas, in ramadan this mulla suspected that the food we had for Iftar wasn't exactly Halal, so he picks up the big dish of "god's gift to nurish our bodies" and threw it in the garbage can in the street. He claimed that he didnt want to be responsible for us eating un-halal food. Fair enough. Apparently this guy found an arbitrage, and did his business buying halal meat from out of town and selling it for twice the going rate. Is he still responsible if I couldnt afford his offering and got allured by the devil beef?
The most obvious example is Islamic banking. Basically, interest is the devil's accountant. We'll have none of that! What we'll do is, I'll make a run to the car dealership, buy the car FOR YOU, and you pay me the difference... uhh well isn't that flat rate and you're kind of ripping me off? NO! Thats the profit I made... its certainly not interest. Ok.. what if I needed cash, how are you going to get your profit? Here is the plan. I'll sell you this Diamond for 1,000 BD, and you can pay me in installments over a year... now take this Diamond over there to the nice bank agent over there, and he will buy back the diamond from you for 700 BD. This is how I can rip you off without giving you 700 and recieving 1000 and getting the good lord upset.
Of course there are the exorcists that charge by the hour like a practitioner, to rid their patients of evil spirits, and the people in the Holy land tour bus business, that arrives in Mecca and people brim out of the bus like a pinata exploded.