The magazine business is on life support, as advertisers have fled the expensive world of print advertising for the practically free (in comparison) world of online advertising. Couple this with multiple increases in the cost of paper, a diminishing number of printing presses, etc., and niche magazines like gaming magazines need another model if they're going to survive. (Even world famous magazines with a broad audience, like Time and Newsweek, have one foot in the grave.)
Nowadays, you see people produce them on a subscription model, typically with Kickstarter backing, but even bigger outfits like MCDM find the model difficult to sustain indefinitely.
It sucks, but it's hard to see how to make it a viable business model, especially if you want to produce something resembling the big glossy monthly magazines of old.
Nowadays, most of that content is produced and sold piecemeal on places like blogs, itch.io, DriveThruRPG/DMs Guild or via zines sold through Kickstarter. There's a lot more of this content produced nowadays, much of it amazing, but gathering it together in one spot is hard to do. Knock! magazine makes a good effort, but it's incredibly pricy and they've only had four issues in four years.