So there's someone back and forth in an email chain with someone from Big Ambulance Inc negotiating price and agree to proceed with sale and then what?
Some posts about this:
https://www.bbc.com/news/technology-67583486
https://perception-point.io/blog/booking-com-customers-hit-b... (same thing happening to booking.com)
https://old.reddit.com/r/travel/comments/19dk51w/bookingcom_...
Don't connect to hotel wifi, or if you do, don't do anything important on it.
It shouldn't be the wild west at those places.
They then set up filters to hide a certain large incoming invoice via filters, and replaced it with the same thing but with a different routing number for the transaction.
A month later that vendor starts sending dunning notices, to everyone’s confusion. $90k gone.