10% a year that's shockingly high. I'm pretty sure that this form of business isn't sustainable at all.
It might even be an attempt to get regular fiat savers to buy USDT and hold it on an exchange as Binance just because of that crazy high interest rate. With how regular interest rates on savings accounts have gone far south under 1% a year, this is a smart move from Binance. One more instance of ignorance and greed that will lead to severe losses. It's doomed to fail.
With banks you know that you are dealing with an entity that won't likely run with your money or reduce it to dust, but come one, this is a crypto exchange ffs.