Carmichael Dave was on Periscope last night, addressing this very problem. What he said was that Woj gets the factual stuff because he works with the agents (like Dan Fegan) when they want to put something out for their own benefit. Because Woj does this, the agents (or others promoting an agenda) reward him with info on imminent trades, free agency decisions, etc. I know this is true, and I know Woj isn't the only one. There are legitimate writers (Sam Amick is one) who do NOT trade future scoops for their integrity.
In this case, Woj was used in an attempt by Dan Fegan to create chaos and apparently force Vlade into making a deal. Vlade stood firm, however, and now Woj looks the fool.