IonCube De-obfuscation Impossible?

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Ok so after lots of reading I see there is almost impossible to De-obfuscation IonCube. However how are these services online able to decode it with no obfuscation?

I really dont get it. I did a search on my code and it is full off offets however i can run it on localhost with no connection and it runs fine. So the code is not getting the offest table from anywhere other that what in the script. So where in the script is it?

Or am i missing something here?

If there is a key shouldn't that key be somewhere in the code?