at what point does canreef delete threads?

[reefwars]

i started a show off your elegance thread last year aroun 9/2011 and now i cant find it i went through all my posts and its not there??

so does canreef delete old threads or do they stay open , if my thread was deleted then why??

maybe im missing it but i went through twice which wasnt easy considering the amount of posts i have


thanks!!