You think AWS and Google do not employ the same sort of growth tactics as MS and others?
Where do you think all the AWS and Goog sales folks hail from?
Hint - the same places as MS sales folks and every other company!
In enterprise land, AWS and Goog are frequently dismissed as they are still relatively immature in how they engage and navigate large orgs, if they even try.
MS (and Oracle and even IBM still to some extent) walk around and laugh all the way to the bank signing 9 and 10 figure deals.