User friendly email newsletter templates work for the one who is offering the newsletter, because they are easy to learn how to use; are attractive to potential customers and clients; and are affordable.
But probably more importantly, these email newsletter templates are customer/client friendly: they have large enough fonts, use a logical organization, have a few colors to distinguish entries and headers, and have linking capabilities so the readers of the newsletter can read complete articles (as just the teaser might appear in the body of the newsletter), can go to the webmasters site to read the newsletter in a different format, or can visit related links (items and sites alluded to in the articles, for example).
I subscribe to numerous writers newsletters, as they are the best for helping us freelancers get jobs, avoid the scam artists and deadbeat clients (who take writing product and run without paying), and learn more and better ways to write, run a writing business, etc.. One of the reasons beyond these that I choose to subscribe and read the ones I do is because they (the webmasters) clearly use decent email newsletter templates. I speak of this as one...