I dropped all of my subscriptions to left leaning magazines and newspapers years ago. However, I still get solicitations to renew. Here is what I do to reward them for their persistence.
They all send self addressed postage paid envelopes. So instead of tossing them I send a note thanking them and explaining that they are too biased for my taste. I used to have a form in my computer to use for this. Now I don’t waste my time with that, I just scribble a note to them explaining my displeasure with their leftward biases. Hopefully this action costs them valuable resources with no return on their investment. I do my part in the fight against the Biased Left Wing Media! I hope others adopt this practice.
I cancelled Slimes, the mag, so long ago, I don't even remember when. Then Newsweak was cancelled during Bush 1's first election year.
I did the samething that you did with the envelopes mailed to me by Newsweak and Slimes. I just loaded up the envelopes with heavy paper trash and returned them with my letter re a good deal marked with a red x through it. Newsweak stopped sending stuff to me when they offered me a free subscription. I sent back on their letter, "I would prefer to beaten by a professional than even look at their filthy maggot infested mag."
During the 92 presidential election I cancelled our subscription to the SF GayRhonicle.
I never listen/watch NBCNNABCCBSSPANMSNBC phoney news. I have even blocked all CNN channels on my dish receiver after I heard that Dish and cable companies deduct a monthly fee if channels are blocked. (I can't verify this)
If every Freeper cancelled their subscriptions to the maggot infested phoney newsmags and fishwraps and sent half of their monthly subscription cost to FreeRepublic, we could start a very healthy trend. Of course many like Miss Marple, you and I are ahead of the game here.