Content generation is virtually infinite for a game of this type. The number one limiting factor is money.
Also, the kind of coffee he sells is some REALLY GOOD coffee. The competition in that genre is virtually absent right now, so it's no wonder many people are itching to give him money so that someone finally makes a new game in that genre.
Space combat sims is not the only genre in severe lack of activity right now. Take city builders for example. The unanimously best one is SimCity 4, release date 2003. In ten years nobody has been able to make something better, and the wound has only grown with Maxis infamous attempts. If some clever guy started a solid crowdfunding project with the intent of filling that gap I would be personally interested.
