So I've been trying to think of other ways to help this and all I have a few half thought ideas which I'm only mentioning in order to hope that someone else expands on them.
I don't know, well, pretty much anything about the Them's Fighting Herds indiegogo aside from the fact that it's done and has some past with Skullgirls. If there's anyway of reaching out to that community, could that help?
There was support from youtubers doing videos on Indivisible but it's not we can just ask them to do the same playthrough or whatever again. Any stuff like speedruns or events that'd help?
We could use the following hypothetical example, (or one like it) to increase how much has been payed. While the indiegogo isn't at 7000 backers, (yet) let's say it is for the sake of argument. One day $5 per existing backer average, (reduce those who don't pay and add those who pay more) is paid. That $35,000 more so if we ever do a rally of support or something one day. And if it's existing fans it doesn't have to be just one day. Though I'm worried about that idea sounding kind of needy/ a scam, see: "Heeeey, we could really just use 5 more bucks today and maybe tomorrow, sooo...."
Sorry if these aren't helpful, though it might be a good example of why I shouldn't be in charge of raising support. I'd be begging voice actors, 505 or even Arc Sys at the first sign of trouble.