Oh, gross. I totally missed this story but I've used Unbound in the past, and used to listen to the associated podcast, Backlisted.
Of all things, for an independent book publisher to waste a million quid that wasn't even theirs on AI to help them make more money, and leave their authors tens of thousands of pounds out of pocket.
It's still trading btw - under a different name (Boundless). I'm not putting a link to their site here.
Times: "Crowdfund publisher rebrands after collapse leaves authors unpaid"