UPX509 pricing memo

💡 What year was the UPX509 memo reviewed by Dr. Juda?
Difficulty: Easy
🤔 According to the UPX509 document, what are the three levers that Google uses to directly affect pricing through tunings of their auction mechanisms?
Difficulty: Medium
🧐 In the UPX509 memo, what concern does Dr. Juda express regarding the term 'directly' when discussing the impact of ad quality launches on pricing?
Difficulty: Hard