Gay from Coin Bureau Youtube channel stated in his last video on Near Protocol that USN is about to be launched. The address he pointed out was Ref Finance. I have a Near Wallet and use Ref Finance, so I checked the site, but haven't seen anything about USN. Let's say it will be launched soon.
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I watched the recent one about Near. It doesn't go into details of USN though. Probably because it is new. Thank you for the suggestion.