Isn't this more of a "We don't want our client / customer information released to The World At Large" question? I would think most business entities have backups of some kind (Scripps being the only exception I can think of), and will pay the ransom to keep any sensitive information off the market.

Edit: Should have added that I find it hard to believe that companies have PB of data backed up. I could believe GB, and maybe even TB, but PB is pretty hard to swallow. The past three companies I've worked for (25 year span) had, at most, a couple of gigs of sensitive information that couldn't be easily replicated.