People like more choices, so consider creating subscription levels that let people sign up to receive content that’s relevant to them. For example, if you sell widgets and tax advice, provide three options on your opt-in form that allow users to sign up to receive info about widgets, info about tax advice or both. Further customize by allowing them to designate how frequently they’d like to hear from you — weekly, monthly or only when something really special is going on. People may be more likely to sign up for your email list if they have some control over the content they’ll receive.
In marketing automation, Ryan Deiss, co-founder of Digital Marketer, often describes the sales funnel as a multi-step, multi-modality process that moves prospective browsers into buyers. It's multi-stepped because lots must occur between the time that a prospect is aware enough to enter your funnel, to the time when they take action and successfully complete a purchase. 
Or, are you a leader, an adventurer or an evangelist? How you position yourself is entirely up to you, but your message must be consistent throughout your entire "pitch" and it needs to be steeped in the truth. Your backstory, and just how you convey that through parables, character flaws and polarity, has much to do with just how well you can "hook" in your prospects to create a mass movement.
The effort you put into building your email list is one of the best investments you can make online. Having access to the inboxes of targeted prospects means you can continue to build and nurture relationships over time, and become a trusted source of valuable industry knowledge. Then, when it’s time for your prospects to buy, you’ll be the first one who comes to mind.

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.

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