...
It's called advertising. ;-)
Point is they somehow found this btc address so someone knows where it came from.
Or they simple did a random selection from the blockchain (most likely).
Point is: They definitely made a random selection. It's about 62,000 addresses. It's like handing out flyers to 62,000 random people. To imply there would be close connections to everybody who received the "0.0005 BTC - flyer" is absurd.