(via Techcrunch) Some other interesting notes about Gmail: The original invites system wasn’t a marketing ploy, it was simply an engineering decision to make sure they could scale There’s a 30-1 engineers to products managers ratio in the Gmail team — it’s certainly one of the biggest...

[gallery] Zarrella’s Hierarchy of Contagiousness | Dan Zarrella As you can see there are three criteria and together they form a funnel of decreasing volumes, like a sales conversion rate funnel. A person must be exposed to your content to ever have a chance of spreading it. This means they...