Neobux is most likely the best profitable PTC website. You just have to be very active to earn A LOT of cash.
I wish I could make money off my MSDN As a user above said he did
Buy reseller hosting from someone and start a web-hosting company.
Take what you are best at, whether on or off the computer.
Then find a way to implement it to the internet.
You need to create traffic your website.
Learn hacking or invest money on neobux =D
Develop a single digital product, and sell that one product on a page.
Focus all your attention toward marketing that single product on search engines, social bookmarking and social networking.
All you have to do is develop a product and find ways to promote it. You won't have to manage a website or anything. And once you find the best ways to promote, find a way to automate that and you got yourself a do-nothing-keep-making-money system. Move on to the next product and repeat the process until you have a large collection of items pulling in consistent revenue for you.
Ah...refer to my post of earning money with just a download.
PTC, HACKING and SELLING, and You could try sharecash too
Ptc - Ex. Neobux.com, Gagabux.com
Cpa - Ex. Cpalead.com
Ads - Ex. adsense.google.com, adbrite.com
Affliate programs - Ex. clickbank.com, Amazon.com
Selling stuff - Ex. Ebay.com, Craigslist.com, Amazon.com
use a source to buy then sell stuff. If your an United states citizen.
Then pm me and i can give you a private auction site.
That can get you some good money reselling.