Sure. In all likelihood ShinyHunters will 'gracefully' point out the weak spots leveraged in the system of the 'customer' upon receiving payment to prevent this happening again next week.
They have a rather strong incentive to keep this a happily-ever-after ending for Instructure and any other target who pays up. It's all taught in Maffia 101.
They can always just hack them again but with a different method this time.
The ransom doesn't bind them from hacking the company multiple times. It just obligates them to destroy the data they collected from this attack.
As a matter of kindness and good business they'll probably wait a few months or a year or so before poking around again but they'll almost certainly continue poking at Instructure's systems.
Data exfil ransom attacks are a business first and foremost. They don't permanently halt or destroy the original infra and their goal is to get a payout for their labor and move on. Maybe the come back around in the future with another, different attack, maybe they don't.
They made their money and made it big in the news as having complied with the ransom payout, no reason to hurt their reputation trying to double dip. Plenty of other soft targets to poke.
On the one side you have white hat hackers and pen-testers who you pay a contract or salary to prod your system. If you really piss them off (i.e. by stiffing them of their pay) some might just steal your data and threaten to leak it unless you pay them.
On the other side are black hat hackers who will drive by your system and if they find a way to break in they'll offer to keep your data private for a ransom fee. And maybe if you have some charisma, decent pay, and/or a good repertoire you might recruit them on/convert them into white hats for your org.
They have a rather strong incentive to keep this a happily-ever-after ending for Instructure and any other target who pays up. It's all taught in Maffia 101.