What do we know about a.karmajinx.club pop-ups? First, they mainly attack Germany, Austria, France, Italy and possibly some other countries as well. For example, for some reasons users in Japan currently experience similar issues. A.karmajinx.club pop-ups are the result of adware currently installed and enabled in your workstation.
A.karmaday.club pop-ups are the result of adware currently installed and enabled in your computer. Such pop-ups, by the way, may happen both in Windows and Mac OSX environments. The infection typically infects Mozilla Firefox, Opera and Google Chrome, even through other browsers are not immune either. Even Safari in Mac OSX is vulnerable.