Right, that's the problem. Your node and PodcastIndex are the only nodes who are getting the boosts. Unless the boost to you is made from Fountain App, the Fountain has no way to know to include the boost in the rankings.
Does podcast index allow you to enter more than one node to receive payments?
Your splits
https://void.cat/d/5aQA7qs3btDQrX6DU17n38.webp
Dispatch's splits (includes Fountain)