I'm the exact same boat on this one, I know it seems wierd, but I only give money for a project after it's complete or near enough complete.
My personal favorite, devs that already finished VN.
3 basic examples:
The Author - Unbroken
Once in a lifetime - Eternum
And obviously one from your signature, but I'm not supporting that one, getting enough money as is, others get mine
I fucking love devs that go through their projects instead of rework into rework into rework.
At the same time, I'm extremely wary of new devs, unless they're very active with actual updates and progress reports. Easier to trust dev that gives frequent progress updates than a dev that posts new special render every 2 weeks with absolutely no update on how new chapter is coming along.
So much stuff gets dropped after 2-3 updates these days. People thinking making VN is easy and instant way to money? Who knows...