Over-optimizations to your Google Ads accounts can occur if the script settings are too aggressive, resulting in dramatic increases or reductions in clicks/impressions/bids etc. In addition, if the PPCnerd Scripts are run too frequently, this can also greatly increase or reduce the volume of clicks/impressions. The key is to schedule the PPCnerd Scripts similar to the frequency of optimizations if you would have to do them manually, and to also make sure that all scripts are run in preview mode before they are run live so as to check that the resulting optimizations are not too aggressive.