free lancers. If you don't know how to do stuff, go learn in sites like coursera/edx/udacity for free. Someone posted freelancer sites somewhere in another site about gain money with internet.
trading, better if you know how to make bots. You can make mean profit of about 1%/day, even more when the market is falling or rising and you get the buy/sell points. Do the math to see your anual profit, I think its worth the risk.
Learn how to be a hacker, and hack things or sell security to others(first option can send you to jail tough)
Ads(blogs, youtube, etc)
Write stuff to sites, but can take years for you to become a good writer and be able to write about interesting stuff
Hack MtGox and win up to 850000 bitcoins(outdated)
You mentioned almost every possible method to make a living through Internet , but The truth is you'll need to work hard and smart..! no easy tricks...! just pure skills ..!
Hacking = Require Skills
Content Writing = Require Skills
Youtube Vids / blogging = Require Skills
Trading : Require Skills
Programming: Require Skills
Designing: Require Skills
Scamming:p : Require Skills[lil less then above mentioned]
So first start today and don't expect much results early but eventually all the efforts will payoff.
