One thing he said that I found was very interesting was the comment about a lot of magazines only being bought by writers who want to see what they publish, and not by readers buying puely for entertainment. I think there's probably a lot of truth in that, though I'd love somebody to prove it wrong. If it is true it's a sad state of affairs.
I dunno, I think it's more complicated than that. As a reader first, I believe strongly in supporting short fiction venues because the influx of new writers and new ideas is a necessary part of the vitality of the body of work available for me to consume, and for many of them (though certainly not all) short fiction is a way in. Would I be as aware of the role of magazines, and the fairly dire straits magazines are in, if I wasn't a writer? Probably not.
Still, before I decided to try my hand at writing, I still subbed to several magazines whose fiction I found worthwhile. How many, and for how long, depended a lot on personal variations in poverty and shifts in the content of magazines. It's not, I think, too surprising that as a writer I tend to sub to those same markets, since after all I know they print stuff I like, and theoretically at least I write stuff I like, so there's a better chance of a match. If I stopped writing right this instant and never wrote another word of fiction again, I'd still sub to those same mags. Now, there are other magazines I sub to *because* I'm a writer and they support that endeavor more directly (Locus, frex) and, because I'm a writer, I hear about magazines and webzines and other markets I probably wouldn't have been aware of as a casual reader, and I'll often buy a single issue of a magazine that seems up my alley to check it out. Would I do that if I wasn't a writer? Probably not nearly as much. On the other hand, if I gave up writing I'd have a lot more time to read, so maybe. (-:
Or: as writers we have a vested personal interest in the health of short fiction markets, but I would hope that our interest as writers is trumped by our interest as readers and as members of the community of readers of our chosen genre(s) first.
So that was a long rambly answer, sorry.
-Suzanne
ETA: Since it's already rambly, adding some stats:
Magazines I currently subscribe to: 5
Of those, ones I'd stay subbed to if I wasn't writing: 3, possibly 4.
Single issues bought in past year: 6 (I think)
Number of those I would have bought even if I wasn't interested in investigating them as a possible venue to submit work to: 4