"Real" race bikes don't have kickstands (don't need the added weight or anything else that can drag, etc.). You need at least the rear at the track or you'll have to lean it against the wall.
When you put a bike up like that, you're really just getting the wheels off the ground -- in this case, perhaps to show off the clean rubber.
I have stands like this (not this quality) and put my R6 up like that so I can clean the tires off. There are times when you just have crud on the tires and I think cleaning them helps to make them stickier when you get back on clean pavement. Plus, cleaning rims is easier on a stand like that. I guess if you just want to show off a bike evenly on both sides (if you have a kickstand, the left is always at a tough angle to photograph), you only need the rear stand.
For photos, sometimes, you want to put tire shine product on the tires to make them look good for photos -- knowing full well, you don't ride on them like that.
Oh and if my bike is to stay unridden for a while (say waiting for snow to melt), I'll store it like that to prevent tire flatspots).
Dennis
