To get people to sign-up in the first place, you need to grab their attention and make it worth their while to sign up. Many website offer "FREE" information or products to people who sign-up with their mailing lists. This technique will work if you offer the website visitors something that is of "value" to them. Value has to go hand-in-hand with promotional materials within your emails. No one wants to be bombarded with sales pitches every time they open an email from you, so don't bother even sending out such emails. The best way to promote your product is to provide information that relates to your product, then add a few sentences that make reference to your product and how it can help with the reader achieve something.

This practice gives users the option (or forces them) to agree to receive email from third parties. Co-registration is very risky and should be used with caution because it can be confusing to recipients if they did not remember leaving boxes checked and accidentally signed up for emails they did not expect. This can easily lead to spam reports and corresponding email deliverability issues.

This is super actionable and thorough. I find the difficult part is coming up with an actual series for the autoresponder, and moving people towards a sale, vs saying “oh, that was nice.” I find many articles devoted to the lead magnet and landing page, without much attention on the autoresponder series – which can actually trigger a sale. Thank you for sharing your email template.
To incentivize the prospect to sign up, it’s important to offer them some sort of free bonus, like an ebook, access to a webinar, or whatever attractive freebie you can give them that is related to your business. But you shouldn't have to bust your butt to put this bonus together. You could collect together past blog posts into one PDF, for example.
In this context, I guess each post can’t be thought of in isolation, but in terms of a mini content ecosystem that comprises of a great blog post optimised for on-page SEO, an upgrade to that post tailored for that specific content, various on-page email conversion points including an exit pop-up or similar -and then you combine all this with your off page link building and outreach efforts. That could be over 5,000 words of content all in just that one package.
Solo ads and Banner ads. One of the platforms I have been using for 3 years now, called LeadsLeap, combines solo ads and banner ads into a single platform. It is essentially an ads platform that includes a mailing element. They email a digest of ads to all members and progressively rotate ads through the mailing. They also provide tools for placing a LeadsLeap ads widget on websites. They present ads on their own website. Each one of my ads generates 10 or so clicks a day, day in and day out. Actively managed by testing new copy regularly will increase this rate. The platform also includes a 10 level deep downline for referrals from which one can earn commissions and ad credits. I have referred fewer than 20 people yet I have over 500 people in my downline.
You can use this strategy to your advantage and increase your email list by giving people an incentive in return for their email. The giveaway could be free access to an e-book, a report, a gift hamper, or perhaps a lucky draw where people enter their emails and get a chance to win. A tantalizing offer is all you need for people to comply. For example:
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