I don't think so. Those who do spam wouldn't be up for giving viglink 25% and then settling for only half of the remaining 75%. Spammers aren't entirely stupid

I don't think so. Those who do spam wouldn't be up for giving viglink 25% and then settling for only half of the remaining 75%. Spammers aren't entirely stupid, they'd go register direct and do what they usually do (set up little spam bait sites) as that would be way more profitable. This would help small publishers more than it would assist spammers.