Did Microsoft completely banned this developer from their other services? To my understanding, the developer account is suspended from GitHub. He is not banned from other MS products.
That is the difference. In Google case, Google completely ban on all of their services to those banned users. If they are banned in Gmail, then likely they are banned from Play Store, Workspace, Google Drive, etc (entire Google ecosystem). In this case, Microsoft didn't banned this developers from their other services, it only the developer's GitHub account is suspended without affecting other services that the developers are using.