Actually you are discussing voting. The voting guilds are what we call trails aka delegate voting and im just clarifying rewards as they relate to voting guilds/trails.
Its the same stuff. As @smooth pointed out, there are no formulas published explaining this. Im just offering what i have seen in my voting experience.
Edit: Wanted to add that Im not aware of info Ned has put out outlining the guilds. Would love to read it, need a link to post outlining proposal. thanks