eh, I don't like copying comments, I wrote it already elsewhere, but I guess I might be excused if posting so rarely.. :P
Not gonna lie, that made me worried for a second as well - but I can see the "why" - USDT was disallowed by UE, so USDC pairs were introduced. Now that effectively Binance was kicked from UE completely, there's not much point in keeping smaller USDC markets at all I guess