So A couple people asked how it works. Here is my review to date. First, recognize this is a pay service and you are paying for convenience. There is nothing they give you that you couldn't find yourself, if you wanted to do the work.
To start you enter a domain that you want to start an email campaign for. The system will then find similarly named domains, as well as sites that by click advertising for the same words. This is very reminiscent of what Estibot does on their "lead finder".
Once you have your list you have two filters you can run. The first is to identify those domains that appear to be parked. This isn't perfect, but its certainly good enough and is a tremendous time saver. The other filter is to pull emails for the domains. You can select all or individually. The emails are pulled right from WHOIS records.
Once you have your list with emails and parked domains removed, you can start an email campaign. You can preconfigure templates to use. The mailing is very simple, just a click of a button. I THINK I saw somewhere that you are limited to 300 emails/day, but that may be wrong.
I have sent only one campaign today, but have two more ready to go. I'll likely send them in the morning. My first was really just to see it work as i think sending the day after a three day weekend is a bad time to send.
I did have one problem, but the support was really quick and they got right on the issue. It was resolved very quickly and that counts for a lot to me.
So far no sales, but I have got responses so i know the emails did go out.
It is kind of pricey at $50/month, but on the other hand it saves a considerable amount of time. Obviously if it leads to one sale it was worthwhile.
My concerns are that they only get emails from WHOIS and not necessarily decision makers. So it is not a replacement for seeking out C suite executives as you would for high end names. But it is adequate for mid level domains.
I am also concerned that as they grow they start to get shut down as spammers.