It's not on their domain though. Or at least, it's not _only_ on their domain. Google is just caching content served from the publisher's domain; you can access that content just fine without going through Google.
Sure, they don't force you to hand over your data and then delete it :) What a noble gesture.
But the version on Googles domain is the version they display in the search results. So it's the version that is seen by users. So it's the version that matters.
