I seem to remember that if you win a prize on a collab you can email Kong and they’ll split it for you. I think they may have said something about ad revenue, but it’s probably not worth bothering anyway on most games.
We plan to support multiple authorship pretty soon. We’ve got a design already to display it, but the points/revenue split is quite a bit of work. But there are some many partnerships we really want to do this.
We unfortunately don’t have an official system in place yet, but we’re more than happy to split contest winnings among multiple developers for collaborations.