Well, the way I see it - people who subscribe on boosty are the ones financing the development of the game, it would be literally impossible without them.
I'm working on the game fulltime now, but at my own pace. It's completely fine if somebody doesn't have the funds to help, or, perhaps just doesn't want to and only wants free stuff. As the time from the last release goes on, people do unsubscribe, many are subscribing only when the new release is ready, that's just how it goes.
I understand that it would be great to have a release every month or just as quickly as possible. That's not how I do things though. I like experimenting, trying new stuff, polishing the content that's already there. Not to mention that I'm also learning as I go, which makes the process not as efficient.
However, it's still great to see that people actually do care, they are paying attention and waiting for a new release, leaving comments and asking questions. As far as I'm concerned, apathy is much worse than any criticism.