Quite often on your site, you’ll want to capture the user’s email address. With spam and phishing attempts increasing daily, though, that’s getting harder and harder. People are just rightfully much more protective of their email address.
Strategies for loosening their grip abound, but I’ve never seen one better than this one. I instantly wanted to see they said some of my domains were worth, so I didn’t hesitate to enter them. On the next page, though, they prompted me for my name and email address so that they could email the report. That would seem perfectly legitimate to most people, and so I bet their conversion percentage is well over 50%.
And that’s the key: users will give up their contact information if they feel compelled enough. You can do that by offering something of exceptional value, as most people advocate, but this way seems much more effective. Just get creative as to how you can make it a reasonable step in the process.