I may be wrong but it was my understanding that the MacKeeper software is actually malware. I had an ad pop up for it under the discussion for a front page news story. Here's the screen capture:
and the link it leads to: http://mackeeperapp.zeobit.com/landings/17/index.php?affid=mzb_1223065280&utm_source=mk_site_targeted&utm_medium=google_site_targeted&utm_campaign=mk_site_targeted&utm_term=&utm_content=&userDefiner=mzb_2311&installer=&trt=5&gclid=CPeUzbOexKsCFWYbQgodgBNU1A&tid_ext=4000000256

and the link it leads to: http://mackeeperapp.zeobit.com/landings/17/index.php?affid=mzb_1223065280&utm_source=mk_site_targeted&utm_medium=google_site_targeted&utm_campaign=mk_site_targeted&utm_term=&utm_content=&userDefiner=mzb_2311&installer=&trt=5&gclid=CPeUzbOexKsCFWYbQgodgBNU1A&tid_ext=4000000256