That's what the article said, enough to be charged with possession, but not trafficking. If you're a drug addict, then it's probably worth the risk as far as he's concerned... Or he was just excessively unlucky to be caught while using casually.
Possession in Canada doesn't really carry much of a consequence anyway. I was once caught by police with a pocket full of acid and ludes and all they did to me was stick me in the drunk tank (I hadn't even gotten high yet) and confiscate my drugs. They cut me loose the next morning without so much as a stern talking to. But I was also, like, 17 at the time and not a mafia boss, so, there's that.
(I don't do any drugs these days save for the occasional joint)