Always get a bit miffed at this sort of thing e.g. Disney/Marvel is a U.S. company but other countries get a first look. Tho I suppose you could say it IS completely U.S. to want to make as much money as possible.
https://www.digitalspy.com/movies/thor/news/a836734/thor-ragnarok-uk-release-date-change/
I'm fine with that