This is Jonathan from Kontera. You don't have to chose just one ad network, for instance because Kontera In-Text ads and AdSense are displayed in completely different parts of a web page, they don't cannibalize each other's clicks. In fact many of Kontera's over 15,000 publishers are already using the two networks together with much success.
In terms of what makes Kontera such a good monetization option, our Contextual Algorithm has the ability to read your HubPages for actual meaning, which is how we can provide more relevant results, leading to higher CTR and better CPC ads.
We also feature an exclusive ad inventory from such brands as Microsoft, Kmart, L'Oreal, Domino's Pizza, HP, Quakers, National Geographic, and more. These premium, often Rich-Media ads are the most attractive to site visitors, give the best possible CPC, and can only be found on Kontera.
Additionally, we're currently offering new publishers a 70% revenue share (the best in the industry), and also offering them a $50 bonus if they get at least 25,000 U.S. page views during their first 30 days on the network.
In terms of Daniel's comments, we do have a minimum payout, which was recently lowered from $100 to $50, but there's no minimum to retain your earnings. Just like with Adsense, if you don't reach our minimum payout threshold, your earnings just rolled over to the next month until you do.
Hope that helps :)
- Jonathan Cohen
Kontera Community Manager