[whoknowswhat11]

Can anyone actually point to this supposed promise.

The only incognito mode I've seen comes with an explicit DISCLAIMER that you WILL probably be tracked by the websites you visit, the ISP you use etc.

The terms for using Chrome are pretty clear, as are youtube / gmail etc.

[ipaddr]

The wording is: 'these activities might be visible' to websites. But that is a lie. They are visible.

[deepfriedrice]

It's actually:

Your activity might still be visible to: * Websites you visit * Your employer or school * Your internet service provider

"might" makes sense because some or none of those may apply, depending on how you're using the browser.