freemyapps help

I am trying to make fake invitations in freemyapps from 1 device. (ipod touch 4 ios 6,1,6)
I tried to fake my UDID with UDIDFaker but it didn't work.
I tried to fake my MAC, IP, APPSTORE ACCOUNT but freemyapps still identifying me!

How freemyapps identify my device?
Does anyone have a way to bypass it?

Thx for helpers.