Wouldn it make sense for bloggers to approve all ad changes before they appear live?
We’re balancing a number of interests. First, we assume there’s some level of trust established between the blogger and the advertiser. Second, a smart advertiser will want to experiment and update the ad a lot; complicating this process would be annoying to both parties. So this trust-but-verify scheme is the most efficient solution we’ve been able to cook up. If an advertiser does something that annoys you, “defer” his ad and drop him a line politely requesting a correction.