But show me one good example of a widely used Internet service that's owned by a public company that willingly cheated its users when it had the chance? Even Apple and Google have not done anything like that.
Also, the change in the TOS wasn't much different than it was before. They were just making it more clear as far as their intent to monetize by allowing your content to be sponsored.
The problem with your position is that its assuming that the company is trying to bait and switch you. It's not.
Google is no better or worse and thinking that they are is ignorance on your side that probably due to bias of media and the general tech community. Want to talk about bait and switch? What about Google Apps that used to be free for small businesses and is no longer? What about Gmail before ads? You can bet that its a matter of time before Google+ uses social ads and any location based service will use your location ads. Bait and switch?
It's ridiculous for you to complain that they didn't "express their intent to make money." Listen to yourself! Look at this site? It was a startup! Of course they want to make lone, as does every other for profit startup on Hacker News.
There's no deception. There's no unethical behavior.
Google benefits from serving content I've ceeated on its search engine by returning it as organic search result. Why am I not compensated?
Why does it not compensate sites like Wikipedia where their content and links are returned under their search engine?
Take a step back and remove your bias. No ones out to get you.