Having some experience of dealing with all sides of this type of situation, I feel as though I should comment.
Is SiteAdvisor a scam? No. In a nutshell, it's something that's used by McAfee customers - they paid for the service and no they don't have the ability to make the decision for themselves as to whether or not a site is safe.
Is SiteAdvisor any good? No. As Cdixon pointed out, they're heavily understaffed. It's full of false positives, it's a fairly crappy service.
Is McAfee AV any good? No. It's one of the easiest AV's to bypass. McAfee is the most commonly found AV in the enterprise we come up against on penetration tests and unless we're using something like metasploit we get past it undetected every time and have done for years.
Is SiteAdvisor a scam? No. In a nutshell, it's something that's used by McAfee customers - they paid for the service and no they don't have the ability to make the decision for themselves as to whether or not a site is safe.
Is SiteAdvisor any good? No. As Cdixon pointed out, they're heavily understaffed. It's full of false positives, it's a fairly crappy service.
Is McAfee AV any good? No. It's one of the easiest AV's to bypass. McAfee is the most commonly found AV in the enterprise we come up against on penetration tests and unless we're using something like metasploit we get past it undetected every time and have done for years.