I lived in a condo building that fined an owner $60k for 2 years of illegal Airbnb leasing (for a $300k condo).
I also had a friend who was evicted for leasing a rental.
Running a business out of the premises is rarely enforced, but it also rarely creates risk or loss for the landlord the way Airbnb does.
[0] See clause 7 at https://cozy.co/blog/8-important-lease-clauses-for-landlords... for typical terms