Do these money making schemes really work?

I stay up late on weekends quite often and eventually there comes a point where all that is on television are the infomercials.

Half of those are about money making schemes whether it be advertising profits from home, ebay profits made easy, tax lien mortgage systems, catalog sales products etc.

Has anyone actually purchased and put to use these various systems with any level of success? I’m half curious whether there is one out there that actually works for the average person simply for the sake of answering my curiosity, and half wanting to get rich a bit more quickly.