The difference is a little bit subtle. The common spam is sent from one person to another, hence usually with the subject "You Win".

The uncommon spam we saw here is from a program to the forum, which is another program; so it says "I Won". This makes lots of senses to me:

• Program is program, there is no you or I;


• Program is stupid, not mention AI. But one should never underestimate the progress in AI. A program can send spam now!


• Buggy program is not a problem, the problem is no one likes to debug, although it's trivial to do s/I/You/g.