by Cristián Lávaque » May 19th, 2011, 9:39 pm
Cheryl's answer is spot on.
Sorry Toto, but there really isn't a better way to deal with this. Even if you used the best tracking methods, flash cookies (are less often deleted), browser footprint, etc., there's always a way around them. It's the same with sharing what they get from you with others, you can make it a little harder, but those that want to get it, will.
All that said, few will do that, and even if they do, they won't do much with what they get, most of the time it's more about getting it than using it. And, if it's of any consolation, they wouldn't have been customers anyway, so it's not like you're losing anything in reality. It'd be worse if it were a physical product where you actually have an expense because of them, but this is just digital and costs are close to naught.