On U. S.-Canadian TV, advs. are placed by some large law firms, looking for people who have contracted lung cancer or other problems from asbestos fibers to join in class action suits. Canada is still an asbestos producer from several mines.
Some other actions, but can't remember their subject at the moment.

Locally, one law firm is often on TV, looking to defend drivers facing incarceration or loss of licenses as the result of drunken driving arrests.
Yes, the modern equivalent of ambulance-chasing.