This is awful and its getting old.
Google is getting downright greedy and is calling it "QS" as an excuse to charge us more.
Here's one example:
I have a keyword, "fish" (for example), it gets 40% CTR, no other bidders on it (exclusive trademark usage), page is as optimized as it can be (Fortune 100 website) ...... bid used to be $0.03 -NOW- $0.25.
Some folks are getting hit with ridiculous $5 minimum bids.
How can Google send a bot to my site and tell me that my site's quality is junk? Suppose my site is completely image based (and I do use alt tags), how can they determine QS?
It's all junk. Sure they are trying to wipe out the MFA guys but jeez, this is pure greed.
Big G needs to understand that this cow can only be milked for so much. Go milk your new GOOTUBE cow.