Maybe I the buyer am willing to pay 150% in the store compared to on your website. I need to find my credit card, to trust one more random website with it... I have certainly decided not to buy things for this reason. And if I don't know too much about you, then I'll take all the sandboxing I can get, and happily pay a premium for that too.
And of course you only get 100% if you have zero fraud, zero hassles, no fees, no awkward cases.
And of course you only get 100% if you have zero fraud, zero hassles, no fees, no awkward cases.