What is better? Google Adsense or Bidvertiser?

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I have these two as my ad revenue program in my website . I saw an increase in my adsense earning and bidvertiser too. However I heard some news from forums that adsense is so strict and sometimes ban accounts for some reason. I never heard of bad news yet from Bidvertiser. Anyway, google adsense pays after you reach $100.00 and bidvertiser minimum payout is $20 through paypal. Who do you think is better? and why?