Exploiting?

So a friend of mine, recently told me about some Gaia Cash Exploits?
I have been extremely busy to go on LG, and therefore I missed out.
Would anyone like to fill me in about it?

http://forum.logicalgamers.com/guides/50664-i-got-bored-so-i-released-gcash-exploit-here-you-go.html#post404969

this?

Old patched, but there is another one

The old one is patched but it involved Virtual Piggy.

it looks interesting,i'll check when it's my 3rd day here