I assume that I am not allowed to put Google Adsense ads behind login because adsense crawler can't access there? Or am I wrong?
I tried to add a login for Adsense crawler under "Access and Authorization" -> "Crawler access" but I am not able to do it. I have Drupal 7 CMS and I created user account for Adsense but the "test login" seems not to work.
So is it safe to just add ads behind login even adsense crawler can't access those pages, is this against adsense rules?