The point is that the old reCAPTCHA (as I understand it) did not set & grab global Google cookies, and thus did not track you across your web browsing. Whereas

The point is that the old reCAPTCHA (as I understand it) did not set & grab global Google cookies, and thus did not track you across your web browsing. Whereas the new one does, and the privacy policy is vague enough to allow Google pretty much any use of the data that they generate from this.