As a matter of fact Google Cloud will also wine and dine a CTO as needed. That's part of the sales process IMHO.

A decision maker can basically choose from where they want to get bribed, so it won't be a crucial factor most of the time.

There's been quite a few documented instances of large scale bribes by Azure.

In quite a few places I saw, it would be either that or sheer incompetence (which was obvious to me at the time, and become obvious to people who came after me and finally decided to migrate away, with more losses on the way that could have been easily avoided).