Because it was pointless. Remaking it in the wrong section afterwards does not help either. And it was not a game when the rules are "Write whatever you want, as long as you comment". There is reason why even games get locked, and that is that they promote spam. This does not help your case either.
How is that spice, though? If you want a thread for random posts, there's both the record attempt and the 'count to 100 before a mod posts', both in which random conversations take place.
If your "game" had had another catchy implementation other than a requirement of 100 posts, it could have worked.
Can I help? Let the users try out different ways to - free you, possibly by writing a couple of sentences. Tell them, the one that get post 100 wins, but do not count the ones that do not put in a good try. That way you all have fun, and it is more unpredictable. Or something.
hey royalty, no offense but that kinda thread was screaming for spam. i might have not been able to resist it if i had came across it too. what, the lust of spam is a powerful foe. or was it the lust of money? huh.. have to look it up