Have you read before investing in SushiUp or SushiDown. This token may suddenly lose price. Because these are not real coins. Not only SushiUp, but many other coins like XRPUp or XRPDown. I think Binance gives you a notification before you trade with the coin. I think people who invest with these coins are already very knowledgeable about crypto.
OP's claim is OK. Just look at the image I
posted. During the recent downtrend. You would have expected all the DOWN leveraged tokens to have made some positive percentage gains but guess what Binance shows? All tokens, both UP and down leveraged tokens are in negatives

Now tell me if this is fair?
It doesn't matter if you know about BLVTs or not, Binance's result are not right. it's their fault.