And an over-promising corporation

A pop-up ad for MacKeeper states "Instant Mac cleanup".  Does this mean as soon as I click the "Start" or whatever button in MacKeeper that MacKeeper will have cleaned up my Mac?  I strongly doubt it.  Ten minutes, two hours, longer?  I don't know.  It really depends on how much data is on a Mac.  Backing up via Time Machine or running Norton Anti-Virus can take up to two hours on my Mac.  I doubt that MacKeeper will be any faster.