If you chose a business model with an elevated level of risk then you'll have extra expenses associated with that.
I really dug that email. It's encouraging that it triggered what sounds like a very real internal discussion amongst multiple people there vs being getting completely ignored.
I know I sound like a PayPal apologist - I'm not! I know there are some very real horror stories out there. It's just that they're probably one of the few payment companies that would enable this business to actually be a business and asking $20K in surety when you're _on the hook too_ isn't as mean spirited as it first appears.