Hi,
in theory it should work. Posts promoted with a ROI of 1.0 are pretty much identical to that business model. Since there are many accounts participating in those services, there should be plenty people wanting to upvote just for the reward alone. And as a user I really prefer @reversed-bidbot because I do not have to commit my sp. I can manually vote or set up a curation trail and all it takes to get money is following that trail.
The real challenge is getting people to use and trust this new system.