at http://www.reddit.com/r/blog/comments/cq1lf/why_do_experts_m...
I seriously doubt that.
Draw your own conclusions.
The reddit crowd is not exactly advertising friendly. What we got was direct human traffic, and 92% of them were blocking javascript. The only bots we saw were the first 10 hits, most of them familiar from our twitter links; shave 2% for the bots, that still leaves you with 90% of the traffic that's worthless.
The reddit staff are aware of this; why else would they thank you for not using a NoScript or ad-block whenever you visit the site with js enabled?
Someone commented that it was nice that they mentioned this, and the author responded with "We know our customers well!"
Sorry but that's ridiculous. Reddit is hard to monetize because it's full of anti consumerist adblock js-blocking privacy freaks.... And they seem to be encouraging it in their users.
Digg has their own marketing/advertising team, unlike reddit. I think this makes the difference.
Reddit has one header ad and a couple of sidebar ads that are self-advertising more often than not.
(I will note for the record that this ad[1] spotted earlier today got a good laugh out of me. Somebody has used reddit's self-serve advertising to its fullest potential).
[1] http://img.skitch.com/20100716-jc2rdcbrfcq62c4aa2u4q6d3dq.pn...
Here is a discussion on the ad: http://www.reddit.com/r/ads/comments/cpm2d/i_cant_believe_so...