Someone in our chat was signing up for Chase. Three of us pasted referral codes at once. It got weird, he googled one instead, and some SEO blog got the $100. So I built Perko. Your friends pool codes in a circle, and when several people have the same company theres a rotation that remembers whose turn it is. It only advances when someone confirms they actually used your code, so you cant game it by clicking your own stuff. Theres also a dumb points shop with a cat you can pet. no defense for ...