Well for one thing, if I ever make a profit, it will be so slight. I have probably invested a grand or more in shipping, fish, tanks, heater, containers, food, etc. that it's not like I could ever make up for it with a spawn or two. The people who make big profits take immaculate care of their bettas, only use their best stock, and often have show winning fish. I think mine will be lovely, but not that lovely.
I haven't sold any fry yet, in fact the only fish I've sold were for the price I've bought them for to people who want to breed, negating the shipping costs. There's another one for the - side of the equation... not that I mind, I'm just saying, betta breeding isn't a booming business or anything :)
~Ask me about discounts on beautiful aquabid fish! ~