I agree that only a very few are serial refunders (its actually funny because I spoke to one of my dorm mates about this Tuesday).

If we assume that all buyers (and I throw all of us in there too) are honest when they buy online products make a decent decision as to what they buy. Few people go willy nilly and buy what ever they want at will. So chances are they will read our pages, mull it over, maybe research then act. If they dont like it they dont like it thats just nature, others forget and thats better for us, but most people who have a product that works for them support it.