So, building up lists of emails is a task you must put some effort behind in order to kick your email marketing efforts into gear. The problem is nobody really wants more email, particularly spam from unknown sources. When I talk about buying email lists, I’m am not talking about buying or renting so called opt-in lists from list brokers. I’m talking about offering something of value as a way to motivate someone to willingly exchange their email address with you in order to receive your offers and additional contact.
Use it to send new subscribers a “welcome” sequence. This is the message that you send to people right after they subscribe to your email list. It could contain a link to your lead magnet for an easy download, a thank you for subscribing, and maybe a call-to-action to check out your most popular blog posts. Every email list needs a welcome series: don’t miss this chance to “woo” your new subscribers and turn them into loyal fans!
Companies considering the use of an email marketing program must make sure that their program does not violate spam laws such as the United States' Controlling the Assault of Non-Solicited Pornography and Marketing Act (CAN-SPAM), the European Privacy and Electronic Communications Regulations 2003, or their Internet service provider's acceptable use policy.
I think what Brian and the testers are missing is that 15k is neither big enough to be impressive nor small enough to be inviting. It’s not a number that works effectively as social proof, and while I can’t test it out myself, I believe, based on evidence for social proof around the web, that DIYthemes would have had much better success with a combined number in the 50k+ range as mentioned above.
There are many vendors out there who sell lists or rent them (though renting means that the list seller maintains ownership and control of the email list). These are collections of email addresses that the vendors sell to any business or individual who can pay the fees. Your email list is considered to be a purchased or shared list if it’s provided to you by a third party, like an email list vendor or affiliate. There's a few ways that vendors build these non opt-in email lists.