Maybe you're misunderstanding the promotion - it's 2 games for $20 total, not each. If not, what games were you expecting to be on sale, Last of Us for $10, GTA V for $20? There's a great selection of games here from megahits like Mass Effect 3, Battlefield 3, and Red Dead Redemption to cult hits like Ico/SOTC collection, Kingdoms of Amalur, and Demons Souls. $10 isn't exactly giving it away but most items are still in stock and the majority of the titles are good.
Sure, $10 is a decent price if you want it to play right now, but if you're planning on sticking it on the shelf for later, then don't buy, as these don't really qualify as "sale" prices. Their stock prices are well above places like Amazon, which gives the appearance that this is a greater deal than it is. Some of these games, like Otomedius Excellent (whatever the hell that is) are below $10 at normal price.
Again, if you don't want to wait for a sale, jump on this. If you don't mind waiting for a sale, I guarantee everything on this list will be below $10 at some point this year (most of them have been already). I mean, nothing on this list is above $15 at places like Amazon and whatnot. At least, not what I looked at.
By the way people, Minecraft doesn't work with this deal. I saw some people mentioned it, so I figured I'd say.
Edit: Looks like there's one good deal--Dragon Age Ultimate. Why that went back up in price on other sites is beyond me, but if you want it, $10 is a good price. I doubt that'll be seeing any sales, and considering its age, it already bottomed out, and now, for some reason, climbed back up a bit.
Forget it, I guess they only had like two copies available for the sale. Way to pull a newegg TRU.