Also, let me point out that advertising on reddit is a royal pain in the ass. They have all kinds of broken processes and weird quirks that have not been fixed since we started trying to advertise there in 2011.
We recently went back to try some new campaigns there and none of it was fixed.
I'm sure if you're doing big media buys (ie., you're microsoft) they will just do it all for you, but from the standpoint of the self-serve advertising, it's really, really broken and difficult.