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From the F.A.Q.:

Avatars are small images that display alongside a user's name. This is a feature that is reserved for established users on the MacRumors Forums. We require a 500 post minimum (user title 6502a or higher) before you are given the opportunity to upload your own custom avatar. A few users were given avatar privileges before this milestone because they won a forum contest.
 
Not really: Saturday, 29 September 2012

How do you get that number? He averages 0.22 posts a day (or 1 post every 4.5 days). He has 203 now, so he needs 297 to get to 500.

That means hes about 3.6 years away from getting to 500 with his current pace. So his prediction of 2015 is somewhat accurate.
 
How do you get that number? He averages 0.22 posts a day (or 1 post every 4.5 days). He has 203 now, so he needs 297 to get to 500.

That means hes about 3.6 years away from getting to 500 with his current pace. So his prediction of 2015 is somewhat accurate.

Yeah, that is correct. I was assuming 250 posts for an avatar (marketplace requirement), thus my false calculation.
Tuesday, 10 November 2015 is the new estimated day then?
 
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