What was your PhD in? How did you go about studying distributed systems? I'm really curious about this topic and appreciate any advice on getting started.
The notification email with the stats isn't the product, it's just a feature. Conspire's real product is their search engine that can find the best person for introducing you to a contact or organization.
Conspire has become my go-to networking tool. It uses your real working relationships, so it's much more accurate and useful than LinkedIn. I've used it to make introductions, and to seek introductions, and it's incredibly powerful.
Without the 'back link', it cannot redirect you to your original search. Your 'from location' is google.com/sorry, so, once you pass the test, it sends you back to google.com/sorry instead of back to your previous activity which triggered the Captcha.
If you're coming from an HTTPS page (which I think HN forces) to an HTTP page, the referer is not sent. It is only sent for HTTP->HTTP and HTTPS->HTTPS (even cross-domain, despite the info that leaks out)