Tutorial for rootlessJB3 (iOS12)
1. Inject this .ipa with Cydia-Impactor
2. Trust Certificate in Settings
3. Start NXBoot
4. Switch to iSuperSU and perform Unsandbox on NXBoot
5. Inject payload via App like the Manual says.
sudo chflags -R arch /Volumes/SDVOLUME/
Change SDVOLUME to the name of your SD-Card!
On MacOS you have to do this cause an archive flag is set on exFAT SD Card Folders.
But u already fixed it with windows :P
U know where I live in Germany so I'm not really south :P however, I just wanted to share my experiences with the offer and refute the claim about the scam