alt Hacker News> What is Postcrossing?
> It's a project that allows you to send postcards and receive postcards back from random people around the world.
> What is Postcrossing?
> It's a project that allows you to send postcards and receive postcards back from random people around the world.
> 423,755 postcards traveling
To point out why USPS took note of them, there are unofficial Postcrossing tracking IDs recording nearly half a million postcards actively in transit from sender to receiver as of when I pulled that from their website a couple minutes ago.