postcardware

Shareware that borders on freeware, in that the author

requests only that satisfied users send a postcard of their

home town or something. (This practice, silly as it might

seem, serves to remind users that they are otherwise getting

something for nothing, and may also be psychologically related

to real estate "sales" in which $1 changes hands just to keep

the transaction from being a gift.)

[Jargon File]