Maybe there are different currencies available to different countries... when I looked at MoonPay, I got a list of just TEN major currencies that did NOT include Hive...
I do have a Bittrex account, so that makes more sense since Bittrex actually is one of the few exchanges that has a USD/Hive trading pair. But sadly, Bittrex does not support Debit/Credit card deposits in the US (banking laws — only BANKS are supposed to issue "cash advances"), so I'm outta luck, I think.
Let's try this. Did you see the support article? Some countries / US states are not included.
Well, that wasn't it, but I did a little poking around and ended up finding this, buried deep in the FAQ area — it's just really hard to buy cryptos in the US without doing a bank transfer to an exchange, buying BTC and exchanging it for the currency you are wanting: