commercial ops at any size of aerodrome however bring a number of additional complexities that your average PPL will be largely ignorant of. Security, Access Controls, Insurance, Fire Cover, ATC/FISO etc. Whether it's liked or not by PPLs these airfields do have CAT activity and the above services are mandated by the CAA/EASA and DFT.
As anyone who has witnessed the many Commercial Operations at Perth will be aware, it ain't necessarily so........