Blizzard.finance is an AMM (Automated Market Maker), not an orderbook exchange. What this means is that instead of placing limit orders, liquidity providers are incentivized to seed liquidity pools with different assets, which can be exchanged by swapping through the liquidity pool.
After providing liquidity to a pool, a user can collect fees from trades across the pool they deposited into (proportional to the share of the pool that their assets account for).
The exchange rates offered by liquidity pools will almost always be the same as market rates due to traders and arbitrageurs bringing the rates Blizzard and other exchanges to market equilibrium.
Blizzard offers Balancer-style weighted pools and Curve-style stable pools.