A payment processor is an entity that handles bureaucracy. It's not a piece of software you can run and forget about. It is many people working around the clock taking phone calls.
I should have been clearer and said "software to aid in running a payment processor" but I used "payment processor" as a shorthand. Just as "open-source Amazon" is shorthand for "software to aid in running an entity like Amazon."
A payment processor is an entity that handles bureaucracy. It's not a piece of software you can run and forget about. It is many people working around the clock taking phone calls.
I should have been clearer and said "software to aid in running a payment processor" but I used "payment processor" as a shorthand. Just as "open-source Amazon" is shorthand for "software to aid in running an entity like Amazon."