Pam, I had wondered the same thing myself, so you are not alone in your thinking. I'm in the "I'm sure I'm just missing the concept" crowd.
I have seen newsletters where excerpts to other VA's blogs or other media that complemented, or brought more meaning to, the newsletter are sometimes included, but not full-on content or articles. I've also seen advertising (affiliate links) as spotlights in newsletters, but more for software, training, or other things helpful for VAs that were included.
I hear you on not coming across as snarky...or hurtful. This/these is/are not my intention(s) either. Just curious, I guess.