The wise thing is to not offer perpetual licenses in the first place. You can’t predict the state of your business in 10 years let alone beyond that. Why make commitments that? Marketing of course. So if they’re going to raise capital that way (by one-time revenue from sales of perpetual licenses) then they can’t just decide that perpetual doesn’t mean perpetual anymore. All in all this will come down to a legal duel between expensive legal teams.
He was never going to go Mars. The first trips to Mars will be extremely dangerous - think the early Viking settlements of North America (they all died). There will of course be far more systematic prep for mars, but the the environment is also far far more hostile. These oligarchs like themselves too much to take risks like that with their lives, or work that hard under constant peril .