In theory, the idea that it was a true 'choice' is suspect. They were a Google company previously, so they'd just use Google by default even if everyone on staf

In theory, the idea that it was a true 'choice' is suspect. They were a Google company previously, so they'd just use Google by default even if everyone on staff also was equally expert at AWS. That said... in reality, they likely had real reasons to use Google since they probably have a higher expertise with it that AWS.