Work from home - the unanswered questions

I've looked at dozens of work from home sites, (though not the ones that claim you can make millions) but they are all so vague in what is actually involved.  Of course you have to pay so I can see how the people running these sites make their money, but whenever I ask for specifics I'm told to check out the info pack which is valued at over $300 but for this week only has been reduced to $39.95!  Why can't I get a simple answer to a simple question?  WHAT IS INVOLVED???  If it means having a blog which runs ads, well I've already done that and it is free through Google.  Does anyone out there know the answer, do you work from home, or know someone who does, and what do they do?