From the cursory glance at landing page, I cannot really tell how does it work or what it is from user's PoV. Is it an RSS feed? An email digest? RSS-to-social-media feed converter?<p>It could really use a more specific description, and maybe a diagram too.
At first glance, this seems like a non-compatible subset of Web Intents [0] that only pertains to subscriptions. Why use the SubToMe button over the Web Intents shim?<p>[0]: <a href="http://webintents.org/" rel="nofollow">http://webintents.org/</a>
Like many others showing confusion as to what this does, allow me to add mine as well.<p>You have to look at this from the reader's perspective, an average reader. Everyone wants to, or should subscribe the web content, but not everyone subscribe equally or subscribe through the same means. Some use email, some RSS, some Twitter, Facebook, browser addon, extension etc. What I am looking for an answer to "Where does this service meet the common-denominator subscriber?" Does it meet them only if they know RSS, or email for that matter? A universal subscribe button for that matter, should be answering such a question.
Event after reading most of the website I was under the impression that this somehow bypassed RSS or something, started wondering about polling/crawling...<p>in case you didn't get it either: it allows you to add feeds to GoogleReader/NewsBlur/etc from a single button.
You know how Opera does it, and how much simpler your solution can be? <a href="http://i.imgur.com/mehY4Hw.png" rel="nofollow">http://i.imgur.com/mehY4Hw.png</a>