Charles, there are already several Drones magazines—even one published in Australia.
Geoff,
I'll bet there are those kind of magazines in many countries. Forums also. Not a bad thing because people make choices. It's their choice.
Magazines are designed and published to make a profit. If they cannot turn a profit, with any Publication, they will fold up the magazine.
How do they make their money? That's simple, advertisement.
What a marketplace for a Publication, with well over 100,000,000 Drones being sold in 2016, and growing BTW, and that figure is a low guess, many retailers of that product will be looking for all and "new" areas to advertise their goods. They compete with each other just like any other retailer.
So, "They" will advertise in ANY Publication that has the "hobbyist’s interests" in mind.
And not only will the Publication take the money, they have an "in house" sales and marketing dept. that will go after it.
100,000,000 drone and guad customers, and growing. That's a bunch of ad money no Publication will turn down.