I’ve long said that Stumbleupon drives a lot more traffic than the other social media sites. Yes, a Digg Front Page (FP) used to bring your server down if you weren’t ready for it. But typically the rush was gone after a few short hours.
I’ve pages that have had visitors from SU for honestly years. Beautiful.
The Lifecycle of a Web Page on StumbleUpon
Weird that they didn’t put a nice embed code on their page, perhaps they should subscribe to my tools.