One problem with the spread of ThnLnk is that it's pretty transparent to the non-technical user. They get to the content with no "experience" with ThnLnk, which means that even though they use ThnLnk to get to the content, they don't attribute it to the service.

So while they "use" it by using the link, they would probably never come back to the home page and apply the service themselves.

And hence I thought of an interstitial or framing the content with a thin toolbar at the top for creating ThnLnks or at least an attribution.

But, personally, it feels a little greasy. The thing is, services like ThnLnk should be as transparent as possible. It shouldn't put a "bump" in the user experience. Unfortunately, this will be at the cost of user acquisition--and potential monetization through targeted ads in a toolbar.