Target is moving away from AWS after Amazon bought Whole Foods
cnbc.com
cnbc.com
It seems to me that trust is a huge element of cloud computing ("There is no cloud, just somebody else's computer") and AWS would be easier to trust if there was no reason to think they would ever try to harm a customer just because they compete with Amazon's retail arm.
Walmart is doing it too: https://www.google.com/search?q=walmart+aws
Seems like it'd be profitable/good business to target retail businesses for cloud services as long as you agree to not compete with their retail operations.
If moving to on-prem, GCP, etc for solid business and technical reasons, then that's one thing
Seems like this was long time coming. I'm sure Amazon's been cannibalizing Target's business in the electronics/books department already. Come to think of it, the only thing I really go to Target for is clothes (I like some of their brands) and Amazon's starting to invade that sector too with Amazon Fashion.
That's just a guess, of course, but it's also why I think Target could be over-reacting a bit.