every other exchange I know uses 1 eth for all assets
I think binance, kucoin and some other popular exchanges do not do this. They have different address for different coins/tokens.
It was my fault.
We always remind users to double-check the address, do not rush through when you are making a transaction but still we hear these kinds of stories.
Anyway, $10K worht coins are a lot and I hope customer support response and help to recover his funds.
Sorry to hear that OP.