How long will this last?

Via Eclectic Iconoclast, I read that PBS is going to start interrupting its programs to air commercials. A Time article anticipates PBS’s defense: “They [PBS] still make programming that commercial TV can’t or doesn’t sustain. Put as many car commercials in it as you want, CBS is never going to air Nova on a weeknight.”

Perhaps I am missing something, but I think that this is perfectly true: PBS cannot be said to be just like the other networks, even now. Clearly, they are still attempting to put on programming that the other networks would find it unprofitable to air, and so their plan appears to be: act like the other networks, only make less money.

What's your stake in this, cowboy?