Quoted from Manic:It would also be nice if you could earn this rather than a random award. Otherwise when you try to show it to a friend it's "wait...wait...we'll get it! I'm sure it'll happen!" And then you lose the last ball.
Strobe Multiball isn't really a random award. It's normally the third Stroke of Luck award, at least if Tournament Mode is not enabled. (I believe there's an exception if you get Super Jets between the 2nd and 3rd SoL's.)