Former Growth Marketing Lead of Good.Co, Techstars startup based in SF ($3M+ raised).
I advise mobile startups on user acquisition and user retention in San Francisco and Paris and I'm used to give talks at incubators on the topic. My best presentation on the topic: http://bit.ly/getmobilegrowth
LinkedIn: http://linkd.in/1xZHkRi
Twitter: http://twitter.com/adrienm
I don't know the exact figures but I'd bet that embedable profiles were a key strategy to drive traffic and revenue from experts' blogs to Clarity - just as embedable videos were key for YouTube's growth.