But what are those companies doing with what they're buying in order to generate their revenue? Ultimately there has to be something that does something useful or enjoyable in and of itself (like food, or a video game), rather than something which is just instrumental for something else. And those useful/enjoyable things will only be profitable if you can sell them to a decent number of people.

You can replace your gamer consumers with corporate customers only if those corporate customers have someone to sell to.