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Sometime in August G went to the sometimes less than 4 ad adblocks.
In those days of July I averaged $25.83 per day. In August my CTR dropped by 9%. My average day through the 30th is $23.56 per day. In that time period I didn't change anything.
That's not enough time for a true test, but maybe we can get an idea with more people reporting. Tell us how you did (if you haven't done anything to contaminate your results).
The first couple of days after they launched it seemed to impact my revenues negatively.
Then about 4 days later, with no other changes, AdSense suddenly started posting record days for a week and revenue has stayed very high since.
Could be the new optimizations, could be more AdWords advertising, maybe competition in my segment of AdWords heated up, really too many factors to know just what's going on but I'm not complaining.