Are you calling them liars?To be fair, you are not really going to make anything on a tune only, on pump gas with a GEN3 engine. Ford tuned it pretty close to the edge. And remember you can only advance the timing such that the fuel can support it. I wouldn't blame Lund for that. Your other concerns seem like they might be valid and worth prodding Lund to help make it better. If you want to see a real increase - E85. Tune.
I sincerely don’t know why you wouldn’t blame them for that. They’re selling a performance tune.
Their web site is a joke and in fairness, I didn’t see any claims about actual performance improvements.