Sometimes if you take a long time to write a post in a thread, by the time you post it the thread has already been locked for 10 minutes. For this reason, this rule is silly and shouldn't be enforced unless someone says something like "I can post in locked freds!!111!!1"
My prediction threads:
Wii U will sell under 40m units (made on 14th September 2012)
PS Vita will sell under 20m units (made on 30th September 2012)
Wii U will sell under 7m in 2013 - I was right