I used to work for a niche publishing company, so let me share something about that industry:
* You can have a cheap publication filled with ads. (See: Computer Shopper, any bridal magazine; or similarly, company-sponsored research pieces.)
OR
* You can have an expensive publication with few or no ads.
(And if you want to see really expensive, how about $1,000 + for a year's subscription to some of the top, industry-specific research oriented publications that accept no advertising.)
$8 an issue is an incredible bargain for Dragon and Dungeon, considering that they are in full color and have relatively few ads.