Well here is the thing, in my country the majority of Airbnb rental are(at least were) illegal. Authorities knew this but hypocritically, illegal rentals were good for tourism, so the state cracked down on a few illegal rentals, for the example, while allowing 99% of them. This is regulatory arbitrage.
Uber on the other hand, didn't have the same luck since legal taxi drivers started to beat up Uber drivers so Uber quickly shut down their operation, as they were running illegal taxis and they couldn't have their cake and eat it too with the justice system... Sometimes it does backfire.
One of the reasons why all these SV tech business got away with it is the fact that they are all located in US, only the landlord or the driver are taking real risks legally. As I said before, if I tried such an operation in my own country, I'll be shut down in no time and sent straight to jail for running illegal hotels. "it's just an app" wouldn't work.
I still think that my government could have banned these apps if they really wanted to at first place, they are so eager to shutdown torrent/illegal VOD websites for instance, but they didn't.