Yea it's like a reward for active users. One of my videos is 20 minutes having recently made use of it. Most of my videos have over 100 views but yet only one has over 500.
at SDA it was posted that the time limit is removed for those with clean accounts (no pirated content).
it could be a combination of all these factors for some people. my account is from 06 and i have a vid with 300,000+ views so it was a given for me to get the extension.
Watched the whole thing. There were a few moments when my jaw just dropped and I was thinking, "did he really just pull that shit off in a single-segment run???"