The target market they're referring to is budget concious travellers, not "big money overseas tourists". They have the "big money" to continue to stay at "big money" hotels and resorts.
With more and more GNs opting to free camp, tourist park operators will naturally target other markets.
This is the market they are marketing at, o/s travellers and not your average back packer in his Whizz Bany. All the cabins will be over flowing soon with the o/ s tourist, due to the fact they mostley rent cars,so need the onsite cabin each night .But if they price this accomodation over the top,they will just go back to hotel/ motel accomodation. O/S visitors are preety thrifty when it comes to what they spend their money on and where.