Quartz
Hero
I have early, pre-Paizo issues of Dragon that were more than happy to advertise games that weren't TSR related, as well as books and video games. I doubt WotC would do the same in a more competitive market.
I'm not talking about games. Rather that gamers could be the target market for other sectors. For example, how many here wear watches? Research would need to be done very carefully. Continuing the watch idea, if it transpired that a significant number of potential readers were high net worth individuals, companies like Patek Phillipe might be persuaded to take advertising space. Other international brands might be car manufacturers and mobile phones. There's a lot of work to be done by someone who knows how to do it.