The Epic Games Store fulfils recent rumors with the announcement of an Epic Mega Sale, a bit of a play on the company's original name, Epic MegaGames. They are promising bargains up to 75% off and an additional $10.00 USD discount on every game priced above $14.99. They are also doubling down on their free game every two weeks (or fortnite, as it were), to a free game every week during the sale, starting with the upcoming release of Stories Untold. This post has a FAQ to address any lingering questions this raises, saying they are actually offering refunds to match their sale prices for all games purchased between May 2nd and yesterday. Here's more:

How do I get $10 off games in the Epic Games store?
You don’t have to do anything. During the sale, all games priced $14.99 and above are an additional $10 off, courtesy of Epic.

Do I get $10 off games that are already on sale?
Yes! As long as the sale price is $14.99 and above.

How long does the Epic Mega Sale last?
The sale ends June 13, 2019.

Will I get $10 off DLC, game add-ons, season passes, or in-game purchases, including V-bucks in Fortnite?
No, the promotional offer only applies to qualifying game purchases from the Epic Games store. It does not apply to any nongame purchases such as add-ons (like DLC or season passes) or in-game purchases (such as in-game currency, like V-bucks in Fortnite, or upgrades like Save The World mode.)

I pre-purchased a game before the start of the Epic Mega Sale and that game hasn’t launched yet. Should I cancel my pre-purchase and then buy it again to take advantage of the $10 discount?
No, you don’t have to! Every player who pre-purchased an unreleased game in the Epic Games store prior to May 16th, 2019 for $14.99 and above will receive a $10 refund! You will receive your $10 refund automatically to the payment method you used in the next 7-12 days.

What if I bought a game just before the Epic Mega Sale?
For all game purchases between May 2nd, 2019 and May 15th, 2019 we will refund you the difference in price between what you paid and what you would have paid during the Epic Mega Sale (inclusive of the $10 off from Epic). You will receive your refund automatically to the payment method you used in the next 7-12 days.