Bidvertiser vs Google adsense

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There is a new program call Bidvertiser which concept similar to Google Adsense. My question is , can I put both in the same page? Will it not violate any TOS? I read the TOS for both programs but end up get confused myself. Also also I heard it's ok to put Yahoo YPN and Google Adsense at the sama page? Please someone who has knowledge about it can give a tip or two. Thanks..:)