I think that's only those who were eligible for the beta version. Apparently, the beta link email also contained the link to the final version. I've checked and double-checked my junk folders and saw nothing (except for spam, which belongs there). The Carrara 4 download link emails don't contain links to Carrara 5. It looks like MSN and AOL have over-zealous junk filters, but Yahoo's is fairly accurate (I rarely find spam in my inbox, or legit mail in the bulk folder).