and they start this move with an outage during the busiest time of the year
why not?
Rackspace is trying to get out of the public cloud game. We had $20k/mo account with them and the rep called me every month asking if we wanted their help (professional services) migrating to AWS. I was baffled but they admitted they don’t want to be in the Cloud game anymore and wanted to get customers off their platform.
Rackspace announced that it has completed the acquisition of Onica, an Amazon Web Services (AWS) Partner Network (APN) Premier Consulting Partner and AWS Managed Service Provider.
Now if ad revenue collection went down...
A mere infrastructure issue, that occurs with all providers from time to time, would hardly constitute a service "wind-down". Based on a very cursory review, GCP's official deprecation policy [1] doesn't seem all that dissimilar from everyone else.
In short, to answer your question: No.