So what exactly is in cheap pizzas?

Because most of my income is sporadic at best, I eat a lot of cheap pizzas. My most recent acquisition is a brand called Roma. Two dollars per pizza, which is not bad at all. The only upsetting part is that one of their selling points is that Roma pizzas are "made with real cheese!"
Which raises a question: who are they competing against, what brand of pizza is out there that can't meet the real cheese from an actual cow threshold?
Which raises another question: where can I buy THAT brand of pizza because not gonna lie two bucks is kind of expensive.