They normally ask in the millions. Generally anyone can pay for it. You could buy it instead if you want. (There is an Auction section, but it's not open for TheHospitalGroup atm)
The amounts they ask from even small websites I find way too high. Perhaps their website asks high so when they go lower they get paid.
If you don't pay and no one else wants to pay, it goes public.
REvil .onion - "At the beginning of next week we will post the first batch of files, namely: Pacient Personal - 20гб TMG OFFICIAL Documents - 50гб"
> why was this even a target?
I assume like almost all hacks, even at the nation level, it's opportunity more than targeted. This website had a sploit, then they found real data behind it.