MacKeeper is a highly invasive malware that can de-stabilize your operating system. It is unethically marketed by Zeobit and a rip-off. Yet YAHOOD keeps carrying their ads! In Yahoo mail, it constantly comes up at the top of my emails! Why or why? I think it means that Yahoo is unethical too. This gives Yahoo bad karma, and it is the reason they are doing badly financially, and why no one wants to buy them and so on. Yahoo is crooked. If they keep promoting MacKeeper, it proves they are crooked.