As do we, the challenge we're facing and it's one we've never experienced before, due to the OCD contest and the influx of posts its spurred, we're now rewarding every entry on top of our previous contributors, we're running out of Hive to reward.
Every reward that comes in we either Powerup or buy Hive when the price dips in the market, then power that up. Right at the beginning when the price was way higher and we'd just launched Planetauto reviews we used to convert it to FIAT and buy tripods, lens, sliders etc.
The Fork especially with what you've outlined is really going to make it easier, I also see the benefit in more comments and yes a higher value would certainly allow us to reward either higher or more, the key is to make sure there not problematic to the posts, bullying etc also rewarding commenters who add value to the OP means more will participate moving forward.