If one campaign might be usefull for one person,it`s not nesserly that it`s recommended for you. one reason is that the wishes of people changes according to regions. i might try 1 or 2 months from each campaign. then, choose the best one.
I've been testing various ad networks for the last few weeks and I have found that Bidvertiser was a waste of space on my site. Adsense performs best, Kontera 2nd.. For example: If i earned $100 w/Adsense for the same page impressions i would earn: $80-$110 from Kontera $10-$12 from Bidvertiser Of course, your earnings will be different depending on the content of your pages, etc, but i think you get the idea..