Do people who share your view see you as more relatable or trustworthy because of your opinion? Not all opinions or even values make much of a (positive) difference. For example, I could point out that I think people should be treated as equals regardless of their gender or sexuality. Most people who agree with that don’t think much about it. It’s such an obvious thing to them. So, telling that doesn’t make much of a difference to people who agree with me. However, many people who disagree with that might think I’m crazy.
The downside of just making offers is that they’re not useful on their own. People on your list won’t receive any value from you unless they buy what you’re promoting, so they have little reason to stay subscribed. That’s why this email marketing strategy doesn’t work alone. And it’s why many e-commerce sites struggle to keep people interested. There are a few exceptions (e.g., Groupon) that rely entirely on making offers—but then the reason people joined the list was specifically to receive those offers.
When you're using email as a marketing tool, you're working on a pretty personal basis. This isn't ‘drive-by' stuff -you're directly targeting customers from their inboxes. There's a huge amount of potential which comes with this kind of marketing... but you'll only reap that potential if you REALLY understand both the marketplace you're operating from, and the audience you're talking to.
If you're inviting readers to download an ebook, for example, and you have a picture of the ebook included in the email, don't just hyperlink the text next to the image telling people to "download it here." Hyperlink the ebook's picture, too. People are drawn to images much more commonly than text, and you want to give your email subscribers as many options to get your ebook as you can.
Bloggers are the most obvious example of focusing on this email marketing strategy almost exclusively. SaaS (Software as a Service) businesses are another group that typically heavily emphasize content emails. Of course, bloggers, SaaS businesses, and everyone else can send content emails while also using the other email marketing strategies. And you should do it, too.

Lengthy paragraphs are off-putting, but I do appreciate that brevity is a tricky skill to master! If you struggle with short copy, write your main body copy out in the manner that feels natural, and then take a (metaphorical) knife to it afterwards. You’ll be amazed at what can be cut without losing any of the sense or feel of the piece. If you really can’t cut it down, try chopping your copy into sections, or offering a ‘Read More’ option leading to the website.
Interests: This is a big one, and Amazon is a prime example of the impact it can have. Recommendations are made based on purchase history, which offers a more personalized message that is more likely to drive engagement and, ultimately, a purchase. What are the bottom-line interests in B2B marketing? How your product or service saves time, money, and resources.
Two particularly important groups for our purposes are customers with a one-time purchase and customers who have purchased multiple times. A customer is sometimes not considered to be loyal or repeat customer until they have purchased two to five times, in which case the single purchase segment is more akin to a warm prospect than a loyal customer.