For those of you who are already familiar with Paid Discovery, you won't be surprised to hear that StumbleUpon is experiencing great success. Most people using Stumble are already focused on discovering new products, sharing photos, and exploring websites. So if you can present your products in a fun and interesting way, there's a good chance advertising will equate to sales.
Stumble has a user base of over 25 million people and they delivered over 17,027,156,146 seconds of brand engagement in 2011 alone. These numbers are expected to increase for 2012. So if you're in the business or you just really like surfing around to see what's out there, StumbleUpon is a great way to do it.
Check out this great inforgraphic on the power of StumbleUpon: