I keep getting emails inviting me to join the ACNielsen Homescan program. They are coming through to my personal email address (not the one I use for signing up for freebies or whatnot.) I know Nielsen does TV ratings, but I have not heard of the homescan program before. Is this a scam? Does anybody know anything about this program? I've googled it and opinion seems to be divided over if it is legit or not.