I couldn't even COUNT the # of URL's that link to the homepage of GoTennis. Poe, you're lucky: only some fotog's, blah, hate you (post whatever the hell the ATP World thing was). The Bernstein brothers of GT have enemies in the WTA due to their insatiable "domain-squatting".
Maybe it's an intended subscription service that would allow more features that just hasn't been opened/activated/etc as of yet. Just an educated guess.