The original idea wouldn't depend much on how much effective HP the reblogger has, more about the HP their followers have and how much of it potentially ends up voting on the post after the reblog.
It's quite a complicated idea, probably start off simple and evolve after that. We'd also need to figure out a way to fund the work towards it if we'd wanna keep the service feeless as well.
Agree with this. It seems complicated but I would like it to be implemented.
If the DHF is funding community projects, I think it makes sense to also fund tools/projects like comment and reblog rewards, and possibly more in the future, to boost engagement on the platform. This could potentially increase user retention as well. You might want to consider submitting a proposal for it.