Reddit is one of very few websites I unblock from Adblock because they aren't annoying, intrusive, obnoxious, or otherwise a pain in the ass. If you can do it out of the way, keep it classy, and not tag me like a wild animal to be tracked, Im fine.
Reddit is not an example of a successful ad solution because their ads are so out of the way and "classy" that they don't even bring in enough revenue to come close to covering their costs.
It still remains to be seen if reddit can ever build a sustainable business.
The only way to successfully advertise on reddit is through guerrilla marketing. Which of course reddit doesn't see a penny of.