It means that
"Using (or spending)
Mileage" is (tracked in-game as)
an Achievement (much like 'Earning Mileage' or 'Session Time Spent').
What are the 2. Hm.
= "you said "still" wrong, which means he was wrong, and is wrong again"
Couldn't it be 1? He was wrong about something in the past, and continues to be wrong in the present.
And even if the context wasn't enough, it was bolded.
As far as you know is not far enough.
We have plenty of videos and pictures and pictures of videos.
And I made a post about it too, there's further evidence that appeared after it.
And finally, there's the article you are commenting on in case my post lacks clarity, is suspiciously untrustworthy, or of insufficient logic to your standards.