It's as easy as some VC bros desperately searching for a bigger fool and finding it. Most likely CapitalOne management consists of friends with the VCs.
It's just another case of the principal/agent problem and normalized white-collar fraud in US tech.
I don't know why the downvotes, that's most probably what happened. These deals are rarely done for some economic reason, it's mostly because somebody knows someone else who can do it and get mutual benefit, a legalized version of fraud.