My suspicion as well, how do they get the color palette so on point. Did a google image search, seems like this blog post are the very first one to use those images, so they must have talked with Google's PR team, otherwise they must have an excessive budget to spend their designers' time to advocate other people's products.

I doubt it is for free.

EDIT: they even get AWS's color palette right:

https://cdn-images-1.medium.com/max/1600/1*ypBcvVoRIWfirQTBq...

The person on the left.

https://cdn-images-1.medium.com/max/1600/1*YrtTkA-xV_eincZV6...

See the machine on the right, it resembles the yellowish color for AWS.