They were never actually a product until recently, I would guess. Someone recently thought that they might catch on. I suppose they make custom spinner wheels for GEO Metros too.
Cigarette holders were popular many moons ago, and as I am aware, they had no cigar analog, nor was one needed, IMO.
I suppose if you were like Sylvester the cat and slobbered all over the head of the cigar so much you caused a problem, it might be useful, although silly looking. If you slobber that much, you probably wouldn't use one anyway. It would be solution to a problem easily solved by other methods or learning new habits for smoking.
The guys I herf with seem to be able to nub a cigar to less than 1/2 an inch if necessary, and I have been known to get em fairly small too, with only the occasional singed thumb and finger. I must admit if one of my buddies pulled one out, I probably wouldn't be able to resist mocking him mercilessly.
But that's just me, and I'm an asshole by nature. YMMV>
