A little while ago, we published some research that showed how gmail users were more “engaged” than, say, hotmail users. Seemed timely, since some ISPs are suggesting lately that they’ll be using “engagement” as a factor to determine whether or not the sender is sending unwanted emails.

Anyway, Click & Pledge did a similar kind of study, where they analyzed donation amounts by domain.

Non-profits might find the study pretty interesting:

http://techscoop.clickandpledge.com/2009/09/click-pledge-part-1.html

Seems gmail and yahoo users give more often, but .mac users give the most per transaction.

(thanks, Kamran!)

Should you ever want to conduct your own experiments, try combining the power of segmentation with our patent-pending automated A/B testing tool.