Avoid 1&1 They've charged back every single sale I made with them. Reason: I'm using a text link via CJ and they said they can't track it without a pixel. This is the only advertiser that does this to me. All my referrals are legit and from organic traffic. I stopped promoting them altogether. Such nonsense.
Sorry to hear that, focus on optimizing your sites to rank for other keywords that brings safe money.