Which coin do they offer?
Spot coins:
ETH, USDT, DAI
Perpetual contracts:
BTC/USD
LINK/USD
ETH/USD
It doesn't looks legit to me. Orderbook moves too fast for 9 mln $ DEX.
Asked few friends who tested dydx and all of them enjoyed it. I must give it a try, I'm sure that its worse than uniswap for my purpose but ... 1inch was worse too, I tested it and loved 1100$ that i received from airdrop 