I'm a bit reluctant to be the first respondent to this question as there are many more experienced people than I on this Forum.
If the machine to which you refer is the type I think it is (there was one installed in the lobby of the office building in which I worked) then I agree that it is capable of producing a reasonably acceptable brew (not espresso machine standard mind you, but drinkable)
(This would be a machine where you insert your money in the slot and select your preferred style of coffee?)
Whether their beans are "better than" your beans depends on where both of them are coming from, how they are treated and stored and how old they are.
When you mention "commercial blend" I assume you are NOT talking about 'supermarket coffee'. I imagine you are sourcing them from a cafe or roaster, in which case they should be at least fresh (?)
Clearly any bean that is sitting in a hopper on top of a hot machine is not going to be at its best for long.
Yes, like the "pod machines" that various companies place for free in commercial premises, the supplier wants you to use their product (beans) and Im surprised they didn't make this clear at the start. I would have thought they would tell you in no uncertain terms that you have to use their beans.
Maybe I have a different type of machine in mind.
In the places I've worked, most of the punters would not spend $3. for a cup of machine coffee and would either go down the street for an espresso or use instant, consequently the machines were never there for very long.