I don't mean any offense, but how is there any technology risk? Unless there's something non-obvious about the way the site works, I believe I could duplicate

I don't mean any offense, but how is there any technology risk? Unless there's something non-obvious about the way the site works, I believe I could duplicate the product in two weeks with less than $10,000. That means it's almost all market risk, i.e., the risk is in whether there is demand for it, not whether you can build it. Something that is 100% technology risk would be, say, a cure for cancer, a new type of filesystem that improves MySQL performance by 100%, or a solar cell that is 1000x more efficient than current solar cells. There's no question that if you created any of those there'd be demand for them -- the challenge is in the creation.