You could just pay for Patreon membership as new updates roll out. A monthly membership with nothing to show for it doesn't incentivize progress (Summertime Saga is a great example of this). In my line of work, I'm expected to produce results for people that pay me to do a job. I expect no less when I choose to support a project.
For the record, I think MGD is a great game. I just can't justify spending money on a project when updates are few and far between, and with minimal new content.