Personally I think the best way to run a hive account when gaining author rewards and such is to keep all the HP from the 50/50 hive/hbd split and then convert the hbd and just withdraw that. That way you both grow your account and also get something out of it too.

An incentive to power up other than governance, curation rewards etc would be nice too. Maybe a game that doesn't use it's own token but hive only. who knows.