I just invented something similar. Though it only supports a maximum of 4 cards, at scale it would cost ~500x less. I call it "penny." Here's my prototype: ht

I just invented something similar. Though it only supports a maximum of 4 cards, at scale it would cost ~500x less. I call it "penny." Here's my prototype: http://imgur.com/49auKC4 http://imgur.com/49auKC4 (reposted from https://news.ycombinator.com/item?id=6733584 https://news.ycombinator.com/item?id=6733584)