The mechanism for accruing baking rewards to Madfish wtez holders is still being discussed internally. However, it appears that the team is considering taking baking rewards as a dev fee as part of the Yupana.Finance funding model, since the Tezos Foundation has stopped funding the project. This will help the team to maintain and improve the Yupana protocol in the future. Additionally, one of the team members has offered to shill their baker if not, suggesting that they are open to the idea of using baking rewards as a way to reward Madfish wtez holders.