It seems like you build off the comments of issues, parsing for the :+1:, you could functionally provide the same tooling, but in the same additive way that waffle.io does.
We're not parsing GitHub comments ATM. That's a good idea though, but it would be difficult to track content. Maybe it's just simpler to track issues in one place and improvements in another?
Example: https://github.com/mitchellh/vagrant-installers/issues/12