the hacker was a sad, lonely vile, pathetic excuse for a human being. Who gives a fcuk how his fcuked up mind works. He effectively killed the global hl2 community. FCUK HIM !
Same reason people write viruses - they are A--holes. They have no lives. They do it because they want to show off and pretend they are so cool, because they have nothing real in their lives to be happy about.
Its possable that the hacker who got it (if it was a hacker) did not know what it is, alot of hackers just..hack, no reason for it, just to get into something he is not ment to be in, and took this while he was at it
also, I doubt he could sell it to anyone who would matter