I use trafficclub.com and so does some of the top domainers in the business. The only disadvantage that I can tell, is that payment are usually delayed by about 2 weeks as trafficclub.com does not pay you until they have been paid by Google, Domain Sponsor, HitFarm, etc.
What I like about trafficclub is the landing page rotation. It is no secret that some domains perform the best at certain venues. You may have one name with a very low CTR at DomainSponsor but it may have a high CTR using Google Adsense or at HitFarm.
Traffic Club automatically analyzes and selects the best ad network for EACH of your domains on a domain by domain basis to maximize total profits. You also have complete control over where your traffic is going. For instance, I have most of my names split 50-50. What that means is that 50% of my traffic goes to Domain Sponsor and the other 50% goes to Google Adsense through trafficclub.com. The system automatically adjust the percentile based upon CTR etc at each respective venue. So if my domain is doing better with Adsense, then the system will automatically adjust the percentile of traffic accordingly so that the bulk of my traffic begins to use Google Adsense. Hope this makes sense.
You can read more about TrafficClub here:
http://www.moniker.com/aftermarket/domain-name-traffic.jsp
Thanks.