Given that we are making pizzas and not, say, stir-fry or other things reliant on flame-pan contact, I feel like natural gas is a bit over the top. We're working primarily in the environment of a convection oven.
The vast majority of common pizza places use electric or gas heated convection ovens with no open flame near the pizza itself. Restaurants and places which make more upscale food may use a brick oven, often made such that the pizza is exposed to the fire to some degree.
Both forms of oven can be replicated using purely electrical means, the former already being employed in many pizza places on Earth, and the latter by a combination of a heated oven and infrared lamps.
And, judging from some of Zor's previous scenarios, these stations are most likely capable of manufacturing (and to a high degree, maintaining) their entire logistics chain, from the collector drones to the material processing and yes, making the pizza.
Given that the OP itself outright states that this entire venture only has 2,500 employees despite having a total useable surface area of at least 1000km^2, it must be heavily automated or else it would simply not function.
You cannot approach this as if it is the foodservice industry. This is, in essence, the largest automated factory known to man (from an in-universe perspective) that just so happens to make pizza. Frankly the only contact those 2500 employees probably have with the pizzas at all is statistical QA for the sheer volume these stations could produce.
LaCroix wrote: ↑
Since the US alone is eating 3 billion pizza per year, this venue (12 stations), can only satisfy about 16.67% of the US consumation. Even though the US is excessive in their pizza consumtion, considering that there are 25 other people for each US american on this planet, it's just a small niche company on the global scale.
I wouldn't call 16% niche given that we can deliver to anywhere in the time it takes to punt a pod down to Earth, which if we use a descent path similar to the shuttle, is about 35 minutes. To anywhere. Plus as you noted, the sheer underutilized scale of these stations gives the business a comical amount of room to expand for little comparative investment. Essentially free, really, since the business owns every step in the logistics chain and doesn't have to pay the vast majority of the "workers" in each step.
For Zor: I question the pods costing any monetary value, since presumably the stations manufacture them on-site using the same resources gathered by the automatic collection ships. Thus, while one could say they have value, they do not necessarily cost that value in monetary means to produce outside of opportunity costs.