Welcome to WebmasterWorld Guest from 188.8.131.52
seems I've stumbled onto a battlefield.
you can open a adsense account in your family members name, Its legal within TOS from same address & same ip address.
3 more 3rd party ad nets added in the last 24 to 48 hours and the ctr and ecpm dropped again. At this point i'd say the two are definitely linked.
You could change nothing whatsoever on your site and still see a drop - or an increase.
How can you say that ? For one, the time length is way too short to tell. And secondly, there are many other reasons why there was a drop for you.
on monday there were 176 3rd party networks and this morning there were 179...179-176=3 new ones in the monday 'till wednesday timeframe.
in the last two months, every time (and i really really followed this stuff ) they add new 3rd party nets, the ctr and ecpm drop significantly.
it even works the other way around. it happened 2 or 3 times in the last period for them to drop a few of the 3rd party nets. of course, the ctr and ecpm went up immediately afterwards.
Then automatically block new ones. (I too also follow this).
Timescale is still too short.
It actually makes sense that earnings drop with the addition of 3rd party ads