Common hacks?

What are the most common hacks people do? Links would be appreciated

If someone gives me a duping method, I will pay him.

Thanks.

A) Orape http://www.mpgh.net/forum/showthread.php?t=878343

B) Who the fuck would give out a duping method for money?
They could get infinite money through duping and RWT, so that little amount of extra money you give them doesn't mean much because they probably get $100 or more worth of items in an hour.

It's very smart of you to use the same username here as you do on Reddit.

Thanks for reply.