One thing is certain: They are getting good results on wasting money on postage stamps and time. Here are some things they could have bought with the stamp money:
For 2 letters, they could have bought one song that they could enjoy.
For 5 letters, they could have bought a 40 ounce jar of peanut butter, which could help when The Famine hits.
For around 20 letters, they could have bought a 20 pound bag of rice.
For the price of 30 letters, they could have picked up a couple of silver half dollars or several silver dimes.
For 35 or 40 letters, they could have picked up a decent set of screwdrivers, or a good set of pliers and an adjustable wrench.
Around 10 letters' worth buys a 6-pack of good quality toilet paper (not the single ply version, either).
For 15 letters' worth, one can get a 40 pack of AA batteries or 12 D batteries. You can get a real good flashlight for about 4 or 5 times this--and rechargeable batteries run 30 letters per 8-pack of Eneloops plus another 40 or so for a charger that can charge them (obviously, better 16-bay chargers or chargers that can charge 8 D cells will be more).
One standard blackout candle costs only 3 letters' worth.
It is obvious that the jokehovians are not able to do anything that might help them during the coming shortages. Whether it be essentials, toys, fun things, or tools, writing all those letters wastes so much on postage and envelopes that they will not be able to afford these other things.