That isn’t true at all, there are many businesses with no refund policies in place. iTunes is one. So long as the refund policy is communicated to the buyer prior to being purchased, that policy is binding. In the case of Epic, the refund policy is communicated through the marketplace terms which satisfies this requirement. Refund laws are also put in place to protect buyers from faulty products, which pretty much every refund policy (including Epic’s) accounts for.