Thanx, yeah i think i found the issue
It's what i suspected, from early february, Google installed a new features which make people on mobile site click TWICE on an ad, to confirm that they really want to visit the ad site. But only on selected sites.
Apparently it's a way to prevent accidental clicks. SO i guess that feb 1st day where i had too many clicks got me into that new "programm" that google installed on some sites. weird coz i havent seen those double clicks and my ads are always well placed in the content so there's no accidental clics. But i guess the "incident" from feb 1 is the reason of the CPC and CTR drop.
Most of my clicks come from mobile too, and traffic too, like 60%/70%.
here is the google ad sense forum discussion about it
topic is "Sudden Drop of CTR 90% in 3 days" on adsense official forum
[
productforums.google.com...]
Apparently, loads and loads of people are affected by this
I'm not using media.net but i'll check that out, thanx :)