So as a pure speculation on Goog's motives, it doesn't sound farfetched enough to call ridiculous. Competitive data is valuable, particularly if you want to strangle the youth in their cradles (or acquire them).

Hypothetical question as much as anything: If Google purchases a company and the data the company stores about their customers, is it illegal for them to use this data for whatever they want?

Lets say it would give them an understanding of what features from AWS people tend to use the most, and they use that to improve Google Cloud, would that be illegal?