Sorry for my super slow reply >.< I just wanted to say thanks for taking the time to type that up :3 It is still indeed an issue, and it looks like it's one I'll likely never be able to do anything about, haha.
Really, itch should have an option that shows customers and supporters how much the dev is actually getting, because it does kinda suck if someone thinks they're sending X amount of money to support a dev, only for the dev to only receive a fraction of what's actually being sent >.<
And also, thank you so much for the support :3