I don't think the adds/content ration in SR is bad. I guess you have not subscribed or looked at any other type of magazines? Look at any Guns, Cars, Gaming, Sporting magazines? They got so many adds that they have pages just having adds, plus articles are spread trough several pages cause add space is limiting them to a single column if that. Its annoying, I find an article I like, maybe the first part of it takes up the majority of the page, and then continued page 22, continued page 24, continued page 67, continued page 72... Once I even got hooked in a article where it sent me to the page, and the magazine was missing that page
. Some magazines I have not renewed because of that. There is one magazine I still subscribe to because despite the advertisement, I really do enjoy the articles.
I personally enjoy reading articles about rocket launches and looking at pictures of the launches; but I don't see that many of those article anymore. They do devote a magazine to Narcon and Naram and personally I do find those magazines a bit dry, but I have enjoyed some articles, and scanned through others.
Did you contact them about your articles? I know by experience it can take a while for your articles to be published.