It wasn't easy to mitigate: re-writes were needed because of the private apis. We ended up doing a lot of optimization to prevent a pet project from costing us too much money, which before the price increase stayed well under the charging threshold. The pricing incident was the only thing on my mind about Google's cloud because we left Google since then. I'm sure things are different now, but then I got too many other things to do before taking a serious look at ditching aws for google.