Her Q can proc it pretty well and since she gains extra gold from klepto, she can get a 
or 
early which is huge.
So in theory, klepto could be viable on Camille but i never tried it out in a real game at the time of writing this. Who knows, it could be better than comet.
well?
I'm not very good at Camille yet but i am trying this out. I always feel strong, and take celestial body just to make sure i last through early game. Been running a tankier version of camille then most i think. Runes are Klepto, Biscuits, Free Boots, Celestial Body, Conditioning, Second Wind.
It's a decent situational summoner.
See, the reason why its not taken on Camille exacerbates her already bad early game. It doesn't give any combat stats, unlike Electrocute or Comet, the two other commonly taken keystones.
Comet is the most general-purpose keystone and is what I would stick with for blind picks. It gives good poke combined with scorch and the Sorcery tree has really good lesser runes like transcendence and nullifying orb.
Electrocute gives more burst for Camille, especially if you max E and the lane is favorable. Cheap shot helps in trades and the burst helps with diving the enemy ADC.
Now Kleptomancy is by no means bad, it's just extremely situational. You don't want to bring it against champions that already bully you hard, like Renekton or Pantheon, because chances are, they will kill or severely wound you when you go in for Klepto procs, on top os losing a combat keystone. What it is good for is against tanks that don't have much kill pressure on you like Maokai , Tahm Kench, or Malphite. These lane you would already be maxing Q, and it allows you to hit your powerspikes as you say much faster.
Thanks guys I've been waiting for so long for an answer.
