I wonder how many of the unsubscribers from message number three had just had enough of it... Having forgiven the first two... a cumulative effect.<p>I know that I have been very happy on several mailing lists of entites wanting to sell me stuff, but when the messages get too frequent, too long, too spammy or too far from my stated interests... Unsubscribe. I forgive a few indiscressions, but when I see this abuse is a pattern, I unsubscribe.<p>We use paper and toner, etc. We can buy extra on a good deal, so I was on Staples list. Started out a message every few weeks, then weekly, then daily... Unsubscribe.<p>I was on NewEgg's list. We use cases of disks and RAM and other commodities, so we can take advantage of exceptional pricing if the chance presents itself. We also sometimes must go to alternate sources if our primary suppliers are out of stock. I am on their list, and even told them what I wanted to see. However, they still tell me about microwave ovens and watches... Much less frequently now that I have told them my preferences, but they are still in danger of losing my subscription. They are on the line... But I'd have canceled already if they sent me offers on microwave ovens more than once in a very great while.