There were 12+ people staying there in an apartment meant for 2 - 4 people at most. And that was just one apartment in the building, I assume more apartments were converted in a similar fashion because that's easy money.
They certainly weren't up to fire code. There weren't any emergency lights that would go on during an emergency and mark the fire exits, because there were no fire exits. In the event of a fire, panicked people would fall all over themselves in the dark as they all scrambled to the only exit, and the mass of people would most likely block it.
That's how they're able to give "better value" for the same price or less.
* cheaper
* better location
* feels more like home / feels cleaner
* more space
* kitchen
AirBnB does not create value, it extracts it from communities. It's not the kind of startup anyone should be cheering on
Unfortunately a lot of interests are also aligned against increasing the supply of housing, because steadily rising house prices ironically reduces the incentive to build (no rush to build if your return from sitting on the land until a suitable amount of time before you want to exit can get you the same ROI), while a lot of home owners don't get that it is often in their interest too to see prices slowly and steadily drop rather than increase (most of us would love to be able to trade up, and so would benefit from prices dropping at a rate similar to typical mortgage repayment, but a lot of people see their house as an investment and get excited when it goes up - for my part I look at the houses that were GBP 400k when my house was 200k, which are now 800k while my house is 400k, and wish the prices had halved instead of doubled).
Airbnb is doing opposite, it displaces long-term rental by converting flats/apartments into hotels.