[iamgoat]

I wonder if there would be any money in having a free option that includes third-party advertising in the envelope. May need to limit the number of free sends per person over a period of time.

I'd be interested in knowing what type of messages people would send with the free method vs paid. You wouldn't send a birthday/congratulations note with ads, but maybe something witty/humorous to a friend. A semi-physical poke, as lame as it sounds.