Epic Offering Partial Refunds for Games Purchased Before They Go on Sale

A tweet from Joshua Boggs indicates Epic Games is now offering partial refunds to those who buy games from the Epic Games Store shortly before those games go on sale (thanks VG247). The store has not posted an official refund policy, but Joshua, who is founder of Studio MayDay, posted the following email he received after one of his recent purchases went on sale:
Hi Joshua,

You recently placed orders from the Epic Games Store. The price of the game(s) you purchased were recently lowered, so we are issuing partial refunds for the difference(s).