Not the same.
If too many people click the button this could be a significant issue for Internet companies. Many depend on tracking for even minor features.
Not really. Either the features NECESSARILY depend on tracking or they do so because the website is either greedy for additional information or too lazy to code it a less intrusive way. In the first case, necessity, the user will have to choose between the tracking and the feature, which was always the case. This software will simply allow them to implement their choice. In the second case, the site owners will recode if they want to keep the users/offer the features.
Yup. Some sites set up 10 or more cookies just to display crap on the page. I've got firefox set to ask for every cookie, and it is insanely annoying. Sites that take to many clicks get abandoned, never to return.
Thank God for the noscript add-on.