[spinningD20]

Yet if the business model / customer's _existing_ service agreement is changed, the temperature of the water that the frog is in just went up a little bit, so folks continue using it, which is what often happens as well.

"well, I'm not sure if they're going to start collecting or using my data, because I don't actually really KNOW that or the extent of everything, just an email from them with a vague update to an equally vague privacy policy that I apparently implicitly agree to if I don't discontinue using their service."

Just like a manufacturer/seller on say, amazon shouldn't be able to revise their product with cheaper quality under the same model number (and yet it happens all the time), changes to the agreement of a service should be treated as a new service.

Whatever the solution, it should be a big enough deal that it cannot be implicitly agreed to, and clear enough language (maybe vetted by a third party review of the agreement) to communicate to all users, what is at stake and how, to which third parties, etc.