There are no refunds of any kind. Once you have paid the money, you will not be getting it back unless there is some failure on my end at which point probably everyone would be refunded, but that is an absolute worst case scenario. Worth mentioning in the spirit of Caveat Emptor.
First off - Shame, Weaston, shame! GB was announced almost 2 years ago!
Secondly - I hope (because there's no reason to believe your vague update messages) you can refund people. Because now it seems like you're pretty close to your own mentioned "worst case scenario".
Money is nice but when you can't hold your own promises and even update people thoroughly on WTF is actually going on on your end, is the money really worth it? Your reputation is ****ed, your mental health is probably in shambles and likely the money is long gone, keeping up with appearances of having it all together when, in fact, you probably have used up money from your own pocket to fulfill the long overdue GB.
Ghosting from designers running their own GB while trying to take on bigger quantities than even vendors can handle, is getting more and more common. People, please don't fall for this.
P.S. I have no stakes in this GB as I did not partake (but I wanted to). Just saying my own thoughts.
P.P.S. Hopefully, this shower thought doesn't come back to bite in my big white hiney.
EDIT: All in all - my main message to Weaston (if he reads this thread and people's negative responses) is this - people would be more understanding if you'd be more open about your struggles and reasoning behind delays. Currently, it seems you're hiding because might be afraid of more backlash. Dude, hold in there and just be transparent on what's actually going on. Updates shorter than Twitter messages just makes it looks like you don't have time AT ALL which, in turn, comes off as you not actually doing what you're telling people you are doing.