Where does it say on Google's TOS that you can't make your earning public?

[Psan]

Webmaster Guidelines

In addition to the standards above, AdSense participants are required to adhere to the webmaster guidelines posted at http://www.google.com/webmasters/guidelines.html. Some relevant items from the guidelines are included below for your reference:

* Do not load pages with irrelevant or excessive key words.
* Do not employ cloaking or sneaky redirects.
* Do not create multiple pages, subdomains, or domains with substantially duplicate content.
* Avoid hidden text or hidden links.
* Keep the links on a given page to a reasonable number (fewer than 100).
* Do not participate in link schemes designed to increase your site's ranking or PageRank. In particular, avoid links to web spammers or "bad neighborhoods" on the web as your website may be affected adversely by those links.

I don't see it anywhere: https://google.com/adsense/policies

 

[HostUltra]

https://www.google.com/adsense/localized-terms

Confidentiality. You agree not to disclose Google Confidential Information without Google's prior written consent. "Google Confidential Information" includes without limitation: (a) all Google software, technology, programming, specifications, materials, guidelines and documentation relating to the Program; (b) click-through rates or other statistics relating to Site performance in the Program provided to You by Google; and (c) any other information designated in writing by Google as "Confidential" or an equivalent designation. It does not include information that has become publicly known through no breach by You or Google, or information that has been (i) independently developed without access to Google Confidential Information, as evidenced in writing; (ii) rightfully received by You from a third party; or (iii) required to be disclosed by law or by a governmental authority.

 

[Psan]

Blah, Thought I was on to something...

 

[rhianna]

You have to read the fine legal print in those clickware/shrinkwrap/online contracts of adhesion.
Contracts of adhesion boil down to take it or leave it deals.