They're being scammed in the sense that NVIDIA is selling a product for a usecase that can't make them money despite NVIDIA advertising (or at least heavily implying) as such.
"Look at all these shovels, you're gonna make so much money if you dig with our shovels, I'm sure you're gonna find the treasure any minute!" knowing full well that there's no treasure, or at least definitely not enough for everyone.

Github actions are famously extremely trash...