There are dozens of reports of people noticing their CPC prices in Google AdWords jump through the roof. With the launch of a new AdWords quality score, a bug has been released and verified by Google to increase the bid price of well performing keywords and ads for no reason.
I've had about 20 keywords go to the £5.00 minimum today, all others stayed the same. These keywords were ok at 15p yesterday.
I'm also seeing keywords go inactive, increase min. bids to $10.00. But these inactive keywords are still showing up for searches.
I had a group of keywords that we were spending $200/day on go inactive and require a minimum bid of $10 to reactivate. No one else is bidding on these keywords anymore so I bet they're also having the same problems.
Jeremy Mayes has an email from Google confirming the issue:
Unfortunately, due to a technical issue, you may notice that the minimum bids for some of your keywords increased dramatically, despite them being high performing, good quality keywords. This is a temporary issue that our engineers are aware of and they are working to resolve it as soon as possible. I am sorry for any inconvenience.
I have received several other reports that Google is working on this issue now.
Don't forget this bug released today: Google Advertiser Charged For Paused Campaign in AdWords.