I think all subscription based magazines are feeling the strain. Especially with the advent of the “free” publications such as S Scale Resource and Model Railroad Hobbyist. Those are my 2 favorite magazines. Dan Dawdy runs the SSR as well as the O Scale Resource and the Indy O and S show. He is always looking for articles and contributors. And as was mentioned above is looking to broaden the appeal by reaching out to modelers in the farm community.
I will tell you that 1/3 to 1/2 of our ~1600 members on the S Scale Facebook page are farming enthusiasts that are looking to broaden out to include railroading.