Ask HN: Software Licenses Confusion

Is it within a company’s rights to sell a non-consumable product, let’s say “Access all of software for X cost”, then within a year or two, turn around and say “Access all of software for X cost with subscription but folks who purchased all software before without subscription now lose access”?

Based off my little knowledge of software licensing, that seems like it’s legal and allowable. So, a company can give a sale to allow access to software with a single purchase, then randomly revoke access and then request you to pay again to access the same stuff you previously thought you bought and had access to?