And while we wait for the store page...
Steam summer getaway badge/trading cards
Craft a game badge
Starting July 3rd, crafting a game badge earned you a "mystery card" rather than a coupon. These mystery cards are now Summer Getaway cards. So if you crafted a badge in the last week, you're already ahead of the game. During the sale, each game badge you craft will get you a Summer Getaway trading card.
View the participating trading card games I own.
Make a purchase
As an additional reward for purchasing, for every $10 USD spent during the sale you'll get a Summer Getaway trading card. To view your progress to the next card, select the "How do I get more cards?" link from your
Summer Getaway badge page. Note: applies to purchases made on the Steam store (including gifts), excluding pre-purchases and in-game purchases.
Vote in the Community's Choice
If you're Steam Level 5 and above, you'll get a card every third time you vote for the
Community's Choice Flash Sale. If you reach Steam Level 5 before the end of the sale, you'll be granted the cards you earned by voting.