As this is my first post in here l will try to keep it brief and not upset anyone, but and it's a big but, you are approaching listbuilding the wrong way, l was and still am,an offline listbroker in mail order and direct mail and for the past 10 years have been doing the same online and a lot of the rules of offline apply online.
First rule to remember that listbuilding is easy, the probem is the customers as they often forget that they joined lists or join lists just to get the freebies then opt out asap and move on to the next victim.
The most important part of my listbuilding both off and online has been the cultivation of the relationship with my customers, first l treat them as suspects and only after l have warmed them up do l put them onto my prospects lists, the buyers still need to be looked after after they have purchased which means not bombarding them with loads of affilliate offers they you have not used yourself.
Before you try to start to build your lists you need a bullet proof email system setup that will actually give you the benefit of th doubt when they get a spam complaint, most email companies who send out emails will not let you import your own emails lists so they can remain on the safe side and not incur hefty fines.
So we are back to how you start to plan gathering emails in the first place, if it's a co registration email with all the proof you require that they have opted in, l can let you have 5,000 fresh ones each week no more than 30 days old, but as with all emails they will have been collected and shared with a few other people as well.
Now here's the kicker, the problem that providers do not tell you, that when you send out an email to these people they are cold suspects and you can expect that 95% will not double opt in with you, but they are cheap to purchase and you can get as many of them as you wish, its all a matter of how you decide to go.....but you still have to find a provider willing to send them, l use a program called zip sender, no affiliate links, look it up for yourself if you wish.
I can tell you that over the years some of the very top internet marketers have built their lists very fast from co reg leads and still do, l know because l supplied some of them.
Today l go for highly targeted leads or subscribers using simple video squeeze pages, it's cheap to do, easy to set up and fun to do just on youtube, although all of the other way ways still work l suspect according to my split tests that video is the way to go to get the best roi.
That was just may two cents, as it's no help say ing co reg is no good unless its explained to you why its no good. have fun