I think you're assuming a meaning that's not here. There's nothing about 'saying that your application is developed in a partnership with Google, endorsed by Go

I think you're assuming a meaning that's not here. There's nothing about 'saying that your application is developed in a partnership with Google, endorsed by Google, supported by Google'. App Engine pricing, technical support, licenses, privacy, acceptable use, etc. are all part of the 'relationship contemplated by this Agreement'. It may not be Google's intent, but the language says I can't talk about any of this without their prior written consent. I'm violating the ToS by writing this comment.