Smartest thing to do is pull an API feed from every exchange that lists Hive.
A red flag goes up if there are any huge arbitrage opportunities (or bugs).
And even if the exchange fucks up there are thousands of market participants and market makers who would see the mistake and plug the hole themselves for the arbitrage profit.

The spot feed is only needed to determine the funding rate.
Hell they could probably just COPY another exchange's funding rate and be fine in a lot of situations.