Why does how you acquire the file matter? It was bought and paid for by the end user(s) to do with as they wished.
1+1+1+1=4
2+2=4
2x2=4
2^2=4
How you group or arrange the 4 items, everyone still ends up with the same thing in the end.
The data doesn't change regardless of how it was acquired. Everyone beats around the bush. I buy a vehicle to do with as I wish, they (the government)are setting out to make enthusiasts a bunch of criminals.
You need to voice your displeasure with GM(and the gubment) over this matter. EFILIVE has given shops who are willing to spend the upfront capitol and time to develop there own maps a way to tune them, so we should be happy there is at least something available.
1995 GMC 2500 SUBURBAN powered by 01 DURAMAX/ALLISON, little of this, a little of that,
DIAMONDEYE 4" exhaust, CORSA muffler, AFE stage 1 dry filter, custom tuning by me, KENNEDY single pump and pump rub kit.