Oh this gave me a nice nostalgia hit! Back in the late 60s I think it was, there was a similar scheme where you sent a dollar to the address at the top of a list of ten names, added your name to the bottom of the list and sent the list to ten other people. There were various other chain letter things going around, threatening a curse if you didn’t pass them on, but this was a specific cash one. I had quite an argument with the idiot who sent it to me - he said the chain wouldn’t work if I broke it. You were supposed to end up with hundreds of dollars.