If you’re just getting started in affiliate marketing don’t be intimidated by the seemingly daunting task of getting started with list building. All lists, regardless of size, were created one email address at at time. One of the best ways to learn list building is to select a few affiliate marketers that you know and like and simply subscribe to their lists. You’ll quickly grasp what it’s all about.
I haven’t heard of Feedblitz – just looking at their website now. Appears that they’re a Feedburner replacement specialising in RSS-to-email (sending your blog subscribers an email about latest posts). Their pricing looks a bit steep (considering Feedburner was free) – so I’d probably choose Mailchimp or Aweber over them? That way you can message up to a few thousand people free of charge.
The first known large-scale non-commercial spam message was sent on 18 January 1994 by an Andrews University system administrator, by cross-posting a religious message to all USENET newsgroups. In January 1994 Mark Eberra started the first email marketing company for opt in email list under the domain Insideconnect.com. He also started the Direct Email Marketing Association to help stop unwanted email and prevent spam.  
What we liked: Ecommerce is definitely Omnisend’s strong suit. The range and depth of integrations available with online stores is impressive. There’s even integration with Google ads for retargeting campaigns, and options to segment lists based on purchase data. The tool also includes some very nice landing page templates. Plus, there’s a free plan that lets you send up to 15,000 emails per month (max. 2,000 per day).
However, with only a few simple templates and styles to choose from, the underwhelming visual impact of emails sent through ConvertKit make it a decidedly “function over form” option—that is, the back-end management and analytics that ConvertKit offers far outshines the experience of the end audience. So if sending beautiful or graphic-heavy emails is your highest priority, you should probably look elsewhere.
This article is informative, but it does not offer distinguishing features between the services covered (other than mailchimp is free). You seemed to go to great lengths to say good things about each – although I’m sure each services has positive aspects. I would have benefited much more from a rating of some sort of the various features of each service, or at least the pros & cons of each.
We’ll warn you right now that as you’re evaluating different email platforms, you’ll likely be tempted to focus a lot of your attention on which platform has the prettiest email templates. This is understandable. But unless you have an e-commerce company and are selling a physical product online, the truth is that the visual aesthetics of your emails are not the most important factor.