Well, looks like I messed up... Today I tried to exchange USDT for Yumani on legacy24.exchange. My transfer went through, but I haven't received anything from them. Support isn't responding, which in itself is already really frustrating, even though they claim to be available 24/7.
My first impression is extremely unpleasant.

It’s a good thing the amount isn’t large. I just decided to test things out by exchanging 400 USDT to see if everything was working properly. Thankfully, I didn’t transfer the entire amount all at once.