Exactly. And to further your point (in case it's not clear) tenants renting out on airbnb allows landlords to increase rent at the inconvenience of the tenant.

Exactly. And to further your point (in case it's not clear) tenants renting out on airbnb allows landlords to increase rent at the inconvenience of the tenant. So if a landlord allows this and the tenant gets extra income part of that extra income is passed on to the landlord as extra rent or the tenant finds a rent increase acceptable if they are able to rent out their unit.