I think I will go for membership whenever the developer actually come up with something that interest me.
I don't find anything valuable during the time period of development whether he takes 3/4/5/6 months:
1. I don't think voting matters. His answers to Q&A is also absurd where he's not clear with the vision of the story yet..All questions about different fantasies are being answered in a "maybe" format for the future beside cuckold. So I don't know what's the point of asking the question if it will always be a maybe. And I don't know whether feedback that he receive from his members will be applied or not. Because that also fall under "maybe" most of the time.
2. Communication about update is always unclear like if he communicate once in a 10 days giving a progress details/sneak peek, it would be great. Infact that's the issue with most of the developers not just MP. None of the developers can predict approximate time of update based on their work efficiency even if they had spent 7/8 years working on same field unless there's some obstacles that stop their progress like holidays/natural disaster.
3. I don't find Sneak peek that much interesting at all...I like the one with Jake, David and Hank where I can guess we will see those characters in upcoming update and discuss about their storyline like what would happen and all ...but rest of the 4/5 sneak peeks of Ana being alone here and there / crying and all, I find it useless. I get it MP don't want to give away climax or tease but Jake/Hank sneak peeks also doesn't ruin any kind of climax about the story or ruin the tease if there is any with them. Ana having coffee is by far the worst useless sneak peek of all time, I mean comeon he can give better sneak peek than that about the story.
I do like the story/genre so I will support him on last few months or during the release, giving the feedback about the release and telling him my own individual expectation from the VN in the future. whether he will apply it or not will remain unsure lol..rest I don't find anything valuable during the time period of the development that interest me no matter how long it takes due to various reasons. Will see after this update whether the upcoming update is worth the wait of 5 months or not.