Just to clarify a couple of things.
The new version will be 0.08, that will add some feature like the stealth mechanic plus the end of the casino arc,
v0.09 is the end of the Casino section. All of the new story content for v0.08 was already included in the alpha.
For the last 2 years I have been following this game, I haven't seen a single monthly update.
v0.01-v0.04 were all one month apart. Then I started getting cocky and overestimating myself with all my big ideas. Also, it hasn't quite been 2 years yet.
I have read his roadmap. Sure, there are one or two updates that could take one month according to Jimjim, but most update will take much longer than one month.
v0.09 will take about 1 month. It is short and concludes the casino story, setting up some future events. (originally apart of v0.08)
v0.10 will take a few months, it is mostly redoing my code for the sake of future versions, many tiny improvements to most aspects of the game. It will not progress the story forward, but it will have some additional content for Days 1 & 2. This is because save files will get broken and you will have to restart your progress. So I figured I might as well go back and add some things I didn't have time for initially. I want a chance to sure up the game's intro before moving forward anyway.
But after that, my intention is to have a release every 1-2 months on average. Except where it is necessary to group a large section of content together for one reason or another.
Any Patron (Or SubscribeStar member) can get permanent access from the $1 tier. Although there are some channels only for active patrons at various tiers.
I subscribed to his patreon for $1 per month! You actually will be given the download link for when version 0.08 beta comes out, a bit(days) before the public release.
The v0.08 BETA is only for $10 supporters. It will come out several days before the Full Release and should have ~95% of the content. It is only intended for testing and bug fixing purposes.