A lot of companies that advertise that you can earn big bucks from home are a waste of time, they are either pyramid schemes or sales...
Basically have a look around at what people are offering, remember, if it sounds too good to be true it probably is..
As Jocasta says, most 'schemes' are a con, but working from home is possible, but you need to explore any skills you can offer, rather than assume that some total stranger is going to offer you a four figure sum out of the goodness of their heart.
II will honestly say it's 100% possible to make money from home, all you need is that one big idea. Stop doing what everyone else is doing, be original and fill a business need.
Rent out a room
Become a virtual assistant
Become a content writer
Sell photos online
These are just a few legitimate working from home ideas, For more ideas and tips on home based jobs visit http://workingfromhomeideas.co.uk