This is the TOS specifically for two of the managed services - it says so right in the link "Google Cloud Machine Learning Group and Google Cloud Machine Learning Engine"

These specific ML-as-a-service products are pretty easy to plug into and resell to third parties, which is why the wording is so restrictive in the TOS.

Many of Google Clouds other ML products, which typically are more customizeable and powerful, do not have these restrictions. The way your comment is worded makes it seem like this restriction is on all of Google Clouds ML products, but it's not.