Fix default karma threshold when none is provided
Fix default karma threshold when none is provided

Plucked from: https://github.com/LessWrong2/Vulcan-Starter/commit/22d46dc524e460b6b300eb49b96a965bf1a62f34

Discordius/Lesswrong2,Discordius/Lesswrong2,Discordius/Lesswrong2,Discordius/Telescope,Discordius/Telescope,Discordius/Telescope,Discordius/Lesswrong2,Discordius/Telescope