First, this only works for newly created account, I can't guarantee for it to work on an existing account. Second, this requires A LOT of patience since it might take an hour for you to finish doing all the steps. If you don't have that, please just move on to another hack or just use the IDA hack I posted earlier which Ianouar3G already posted :P. Also, this hack can only give you a max of 5k gems total and it seems 1k gems a day but this hack is only designed to give you 999 gems per use. I can only guarantee the 999 gems hack, and can't guarantee getting more than that BUT I did get 5k on my devices when i tried it.
So, still reading this and want to continue? As I said, this will require a lot of patience.
Steps:
1. If you have the game installed, delete it (you will lose your game progress. So do not proceed if you have an awesome account already)
2. Backup your device to icloud/itunes
3. Restore your device so it becomes non-jb
4. Once device is restored (non-jb), download/install the game Eternity Warriors 3
5. Finish tutorial
6. Now that tutorial is finished, click the add gems link (top right) then watch one of the Free Videos and you'll get 1 gem
7. Now click the "Get more" option so you'll see the Tapjoy page
8. Now close the game from multi-task
9. JB your device.
Proceed below for the jb hack installation:
Requirements:
- iFile or iFunbox
- Jailbroken Device w/ Cydia Substrate
Hack features:
- 999 gems when you load the game
Download:
Link 1
Hack instructions:
1 - Download the file and extract.
2 - Copy to /Library/MobileSubstrate/DynamicLibraries
3 - You can also add/use the binary hack I created along with this hack : BINARY HACK LINK
4 - respring
5 - Run game and once it loads, it will show you have received 999 gems
6. There is a limit of 1k gems a day, so after you get the gems, please delete the hack and try it again after 24hrs. If you use the hack more than once, you will get an error and possibly unable to get more gems