Wow. Their rates used to be so high. Wonder what happened. Now their rates are as bad as Adbrites inline thingy's.
Yeah, I have a site that has both kontera and adsense and it prices about 1/6 of what adsense does. Every little bit helps, though.
You can use em together I have made around $25 with adsense and $4 with Kontera at the same time... actually $25[adsense] in 13 days and $4[kontera] in 2.5 months