The whole of Norway already is on Airbnb, @Lizzie.
Kinda... 😄 Except from the booking fees and cleaning fees. 😉
I don't know if you remember an old thread in Community were a fellow Norwegian explained that when renting cabins in Norway it is expected that the guest clean the cabin before departure? It is much of the same. You borrow and then leave without marks or traces. Its a trust issue. I can see from some reviews that this is very strange for many foreign guests.
I go to Sweden every summer. Its a long ride for me to get there. So I use the oportunity when in Oslo visiting friends during my summer vacations. We do something called "Harry-shopping". Harry being the nickname for something a bit outdated, strange, cheap schanck etc. The funny thing is: I understand Swedish. I sometimes have to use Swedish words to be understood. But more and more Swedes don't understand Norwegian and want me to speak English. Very sad.