The best part about opt-ins is that they help bring in new visitors for free! Not to mention their customer service team are always willing/able (and eager)to answer any questions you might have, I've never had one go unanswered throughout my entire time with them so far - which has been more than 3 years now!! It's not something i would highly recommend however if someone tells me it works great then maybe give us an opportunity? We're seeing some traffic increase from our previous methods but we still need people who want what WE sell; therefore having these kinds helps get those numbers up even higher :).