Others would be: Market making on the internal market or on other HBD exchanges. You can use it to create DHF proposals (burn) and if you're operating a DHF proposal you get paid in it and can use it to hold proposal project funds (w/stabilized purchase power) for expenses without needing to constantly do additional trading (into some other stablecoin or fiat). I think some on chain games/apps may accept it. Other than that, agree, not much at present. Yield is the main current draw. Future potential demand for HBD appears in the valuation of HIVE.