You're welcome! I am very data driven as an individual, in case the post didn't show that!
Rewards aren't necessarily a measure of quality at all, because people with hive power determine the rewards, and their vote is what they value. They determine that, but on the whole, you would think that the property of quality would emerge across the user base of hive.
There are several issues to consider: distribution of hive power, people's motives and actions for voting on content, and the variable that every hive account has its own motivations, goals, and purpose.