I have both AS and VX accounts. Never linked them, never got any email about linking them.
I fly AS regularly (average 2X/month). I have never set foot on any VX aircraft.
I have a modest stash of AS miles. Zero VX miles.
I am lowly plain-vanilla MPV on AS (3rd year running). Bupkiss for status on VX.
I live in Seattle.
Out of the blue, 10,000 AS miles showed up in my AS account today.
I'm not complaining about anything (well, American Airlines works harder to screw their customers than any other airline, period - OK, there's my complaint).
This 10K goodie seems pretty random. Thanks, guys!