If you have a proven track record in a particular field, can prove past success, or have trained in matters of the mind, life coaching or mentorship could be for you. People, especially soon to be entrepreneurs, seek guidance through mentorship and life coaches. You can setup your services from the comforts of your home with no monetary investment.
Often, what happens is that we run into unscrupulous Internet Marketers (IMs) who have less-than altruistic intentions of extracting money from you rather than helping you to make it. However, this isn't something new. People have been falling for networking marketing, pyramid schemes, and affiliate marketing scams since before the start of the net.