That what you liked was actually exactly why we failed so far.
1. Users needed to do a conscious choice, clicking the button. Our research and data showed that was not what people wanted or did.
2. The button was to hard to add to a site and also visible and promoted a brand etc. All things publishers don't want. Besides the button does not work on any social network or content platform. The new solution works anywhere and is when it's hardest to use adding a meta-tag.
The new solution is a "fire and forget" solution. You set it up ones and then it just work. For both contributors and creators/publishers.