Hey, I appreciate the questions!
1. Right now my release schedule is still in the works. I haven't really decided if I'll go for longer (full chapter) updates or smaller (maybe half chapter) updates. All of that will depend greatly on how my workflow goes over the preceding months. Its still really early to promise anything for certain. I can promise that as a fan who gets annoyed with super long wait times for releases, I'm going to be spending all my free time working on the game.
2. For the most-part the "influencing plot-points" will only be smaller details. I have a very clear plan for the overall story, the major characters and all the major plot points! But since this is my first real creative project in a looong time, a lot of the smaller details are changing and evolving along the way. So I figured if the opportunity arose, maybe some of the supporters could get a chance to vote on it. Truthfully, though, it's mostly going to be for character details, and smaller changes in the story. I've noted this, and I'll be changing that to say "influencing side-characters and minor plot points" in future updates.
Thanks for the interest in the game