[notSupplied]

The comparison to "cancelling" is coming up a lot, but I think this is a reasonably simple way to distinguish the two:

Employment requires sustained two-way consent. An employer should not have to pay someone money only to have that person make their lives more difficult than otherwise. Just as an employee should be free to quit a company whose goals they find disagreeable.

Cancelling is when a 3rd party comes into an otherwise consensual employer-employee relationship (or publisher-author relationship, really any business relationship) and demanding that to end.