Houston's, one of the first in existence, if not _the_ first TV station in the nation, has commercials from most car companies, banks, etc ... at the very beginning, and end, of programming.
These are blatant _commercials_, some going up to 30 seconds, but most in the 15 second range, and run one after another for up to five minutes.
There is no way I would contribute again even if they stopped the commercials, and particularly after seeing the Taj Mahal they built themselves, which is why I suspect they continue to have to rely upon them.
I stopped contributing many years ago when a $20 check was returned for not meeting the "minimum contribution" amount.
That, and I trained one of their audio engineers as an apprentice many years ago, who is now a key player, so I occasionally get to hear some of the dirty laundry.