Depositphotos credits can no longer be used by businesses

The change, made in March this year[1], means that purchased credits are now worthless for business owners, since they can no longer legally be used.

Is this kind of bait and switch really legal, where something was sold at face value but then that value was changed completely?

[0] https://web.archive.org/web/20171211194322/https://depositphotos.com/corporate-accounts.html

[1] https://web.archive.org/web/20210309230343/https://fi.depositphotos.com/corporate-accounts.html