In April of 2005, I conducted a survey of more than 250 real estate marketing websites. These were not corporate websites - they were the personal marketing websites of individual agents.
What shocked me was that the majority of these websites (nearly 65%) had no way to capture the email addresses of visitors. I'm assuming the owners of these sites expected visitors to contact them immediately upon visiting. But that's too heavy a burden to put on a website. It's rare that you can shorten the sales cycle to nothing more than a web visit and expect any results.
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