A stock & custom promotional display catalog arrives in David’s mailbox. But, David’s in interactive advertising and will never need to buy those products. They could have figured that out by crawling engeljournal.com, which they already had on file.
Now, David will have to discard that catalog. It’s sad to see a tree die in vain.
Here is a list of 5,000 random domains. You can use this if you’re doing any sort of research where you need a random sample of domains. At this time, there are approximately 119,832,805 domains with extensions on in this list (“the population”). If I calculated the margin of error (“confidence interval”) correctly, this sample size represents a 1.819% margin of error for the given population.