Hmm, sounds familiar, but cannot remember for sure. Can you please provide more details on what the concept is?
Yes, sure. In few words, UOS is blockchain protocol with reputation system, built to be the standard for evaluation of trustworthiness on the web. UOS introduces a new type of blockchain transactions social. The social transaction is a reaction of network participants on each others activity recorded in a public distributed ledger. In addition to account balance and its financial transactions. But of course, better Google them to examine more. And also interested to know your thoughts on what the guys are offering