Hi stm, I have a question regarding cutting zones...
I've collected a whitelist of some big volume zones in ZA but I noticed that the rate at which I cut non profitable zones to get to the rest of the profitable zones slows down. Also noticed that propellerads add more zones over time. After getting under 100K impressions in the traffic estimator, the max bid jumps to 40+ but the daily volume is only around 1500, yet it's costing me more money to cut bad placements and it's very slow.
Is it worth it to cut zones to the end or is having the big volume zones already enough?