I once had google adwords flooding my website with some ridiculous number like 1000 clicks in 5 minutes, zeroing my daily budget in just a few seconds. The clic

I once had google adwords flooding my website with some ridiculous number like 1000 clicks in 5 minutes, zeroing my daily budget in just a few seconds. The clicks had nothing to do with my campaign keywords, which was set to gradually distribuite the adverts during the day instead of rushing to the budget limit. Conversion was terrible, as in no one subscribed to the newsletter (the website usually had a very high newsletter conversion rate (20-30%? I forgot), but of those 1000, not even one person decided to subscribe. The ad spend for the day (I remember now) was even higher than the daily limit. I spent two weeks talking to the useless billing support that would admit no fault before giving up and paying for a "bug" in their system.