swap.hive-zing swap pair only gives 0.25% fee to liquidity providers, along with daily zing rewards, we can't "force" it to give us a % afaik, this is something that's been annoying to me compared to other chains where devs/projects can take a fee, the books on hive-engine are feeless too.
We will however make up for it with nft trading fees, although it won't be large and half will burn zing, and in the future with vsc helping us bridge zing outside of hive maybe we can capitalize on that more.