I swear that every week is an NPR pledge drive. I know they say they only do it a few times a year, but every time I feel like one just ended. Every time my response to the whole affair is, “if you really want me to pledge, give the option of paying my way out of this radio hell you call a pledge drive.”
I think the technology has come far enough that they could. I connect to WNYC through a web stream anyway, and I like my local channel (especially Soterious Johnson). I would easily pay $50 if they provided me with a unique stream that had a maximum of 1 connection and expired when the pledge drive ended. This stream could default to national programming when they’re yammering on about matching funds and special offers. I’m guessing that there would be a whole bunch of people just like me that would pay to make the pain go away.
overstated 
WYPR Baltimore/WYPF Frederick/WYPO Ocean City does it, with subtle 10 second spots to encourage listeners to contribute on the web site prior to the actual drive. For each $250k (IIRC) they raise, they take a day away.
.) I’m impressed, I must say. Really rarely do I encounter a blog that’s both educative and entertaining, and let me tell you, you have hit the nail on the head. Your idea is outstanding; the issue is something that not enough people are speaking intelligently about. I am very happy that I stumbled across this in my search for something relating to this.