There are thousands of exploits in FFXI. Many of the Final Fantasy XI exploits will end in your account being banned if caught. However if you are one of the first people to know about a dupe and you end up doing it the odds of you being banned and caught for it are slim to none. This in turn will allow you to stay away from being banned and still enjoy the benefits of FFXI exploits. Many players use exploits still today in FFXI however only a few actually get to use them before major rollbacks due to being in a selective group of people knowing about them before others.
Here is an example of FFXI Exploits Final Fantasy XI Exploit Information submitted by our community in the past. (Note this information is not valid and should be considered nerfed)
An exploit currently available in Tavnazian Safehold, give by Justinius
and in the end receive one of these items.
The reward is random from the following items:
Miratete's Memoirs(exp scroll)
Now, the exploit is to actually find which item you want from this quest by using a very easy exploit. This allows you to find which item you want and than every week redo the quest and get what you want. The most wanted item from this is the Orchalcum ore, so now you can get one every week with ease.