Its not a very well described idea. Weekly as in by mail? Who is going to staple them together? Do they all arrive at once? Do you mean to just sell packets of postcards?
Yea like, sending a postcard each week by mail and you can staple them together once they arrive to create something like a chain or bigger card :)
How about a very low end tablet that one would put on his/her wall and that would update itself each week with a different picture?
too expensive
Technically that's not a postcard. I see a mail with maybe a sort of attachment in postcard form. But then I have to print it to get the physical card befor I can do anything with it. Be it stapling together with the other cards or directly sending it to someone. But why not email it then immediately i received it? Saves me lot of trouble.
I'm pretty sure that "mail" means the post office, not email. So you would receive a physical postcard.