There are two things that MrDots has consistently done well during the 22 months since DMD launched : his eye-catching images are terrific ; his keen business sense.
The only likely extra revenue there would be if DMD and Melody updates were alternated, this would effectively produce 2 more DMD updates per year but reduce Melody updates by two, would be the BMAC donors. But since there are Melody patrons who prefer that project, there would be a revenue drop from them because some would discontinue their pledge.
I believe the deciding factor is the THIRD studio project, as yet unannounced. Melody was an instant success. Main reason? Many top-tier patrons are indirectly supporting DMD by supporting the studio on Patreon. I'm sure MrDots has been in contact with each patron in order to learn each one's preferences concerning the present update situation. His thinking seems to be that he wants to complete Melody (announced to be a planned 16-18 updates) BEFORE DMD. This would allow DMD to transition the 3rd project, on Patreon, with hopefully similar results as Melody.
So, this is long term thinking by MrDots. He seems to be in strong agreement with the vast majority of fans in this thread that DMD is the more popular game.