> Also, I don't think sellers have to deal with chargebacks, although Apple might have their own version of a chargeback, but I am not sure. They absolutely do

> Also, I don't think sellers have to deal with chargebacks, although Apple might have their own version of a chargeback, but I am not sure. They absolutely do, just through Apple, "Disputes". Apple will refund the user the full purchase price (that's fun, $10 app, you get $7 after the Apple cut, and on refund, you have to refund $10, so you're actually out money). And too many disputes will get your developer privileges restricted or revoked.