I tried scaling by duplicating my profitable adgroup. It did great on day 1 of scaling. Then on day 2 i cut the adgroups that were negative roi. And it bombed!
I noticed that everytime i cut a negative adgroup the sales that day go way down for all the other adgroups.
I've not touched the good performing adgroups, but for some reason the performance drops way down on the second day of running them.
What am i doing wrong? Any ideas?