From a crime-business point of view, things can only get worse.
Technically, data that is copied cannot be remotely deleted or self-destroyed, nor prevented from doing additional copies. Not finding the stolen data already in the black market is pointless. Criminals might want to keep such data in the fridge for future use.
Both In my opinion, and judging from past cases of sextortion, the case may result in an endless blackmail until some condition is reached.
In known sextortion cases, criminals never deleted the offending material and continued to blackmail victims to pay a small fee regularly to keep the material private. This has a lot of common points with regualr mafia who demand money from shop-owners.
Cyber criminals are starting to act like traditional mafia, but they can use technology to remain mostly anonymous without need for consensus, bribery or threat to police officers.
It is believable than new criminal businesses will transform into ransom fees intended not to divulge yet the information stolen.
It can be hypotesized that the ransom will end when data stolen is enough out of date so that the harm done by publishing information is not enough to cover the current, past and future fees (anectode: if you are living all your life in a rent apartment, you should have bought it long ago), or when the company is ready to be put out of business in favour of a new company inheriting lots of assets.
These are just hypoteses