The huge ROI comes down to a simple fact: the price of UNI is very high.

The incentive to buy uniswap is just influence on governance. Hive has a governance model.

So why aren't people buying hive instead of UNI? Not because of low ROI on staking. Speculation is the answer. Once people sell their returns on UNI tokens, price goes down, which takes ROI down, which makes eve more people sell, and the downward spiral will have no end.

Of course in the meantime, the right thing to do is farm and dump on UNI bagholders.