I'm just sayin', not that this ever really happened, but if it did it would be very funny......
Let's say someone took a ONE dollar bill and a note that said:
Sirs:
I am interested in donating and volunteering to the Republican Party. Please let me know how I can do more in my community,
Sincerely,
Your Trumpster Neighbor
and mailed it to:
Republican National Committee
310 First St SE,
Washington, DC 20003
Total cost - less than $2. Perhaps the greedy folks at the RNC would LOVE to have a new donor and volunteer. Certainly someone would have to open the letter, process the donation and deposit it. Cost - at least $2 - probably more just in manpower.
And of course the name and address would be passed on to whoever mails out RNC anti-democracy propaganda. Cost - even more. This person would then be put on a list to receive mail-outs on a regular basis for at least a year even if no further donations or communications were received. Cost - approx $1-$2 per mail-out IIRC. These mail-outs come out several times per month so the costs will add up.
And what political party wouldn't like to get a new volunteer to do free work for them? Someone from the local GOP might make contact with them to get them up to speed on how they could help in the local area. This will cost a few more $$$.
On the Trumpster neighbor's side - think of the extra junk mail and donation requests they might receive. And the calls from the local GOP asking them to volunteer. They'll love it!
And we all know that the Post Office could use a little love. All of those mail-outs that the GOP sends out cost $$ that will help keep the post office afloat.