I would say that my feedback is that there is a lack of any explanation what it even going on. I don't see any sort of gameplay possible. All I saw that you could really do is try to see how high of a bundle price you can get. By selecting games, then hitting deslect all, followed by repeatedly selecting//"deslect all" games, I was able to get the bundle cost that was over $2000. Clicking a selection twice (so that it selects and then deselects) resets the total, but otherwise it just keeps climbing.
I realize that the top says to select games, then hit confirm, but I sure as hell am not going to click anything that says "confirm" when the bundle price is a couple thousand dollars for games that would total less than $10 when not on sale. If it wasn't for a screencap in this thread, I would never have even known there was anything else to do.