I agree this looks like a great enterprise.
The maintainer will review a PR and either accept the PR or ask you to modify it to better fit their requirements or reject it.
For example one of their requirements were no 0 vote rows. So that's a pretty simple SQL query on the database and can be checked before the maintainer does a merge.
All data was required to be sourced. I got most of my data from state and county websites so those links were included with the comments in the PR.
In addition I was in communication with the team via their discord so they would ask for changes to PRs from there also.
This data looks cool too, I'll have a look in the Discord...
I think the final calculation is based on the percent you've added to the final dataset.
edit:
yeah here's the repo that calculates the final payment. https://github.com/dolthub/bounties
I'm kind of fascinated by the process, but I am having a hard time figuring out how this can really work. It can't really be as simple as paying people to shove arbitrary data of unknown value in their dbs, can it?