That was my intuition at first too, but the original comment specified that they weren't borrowing all this money they're spending. The article also says how this is part of NVIDIA's strategy to enable demand, not create it, so supposedly these investments into their customers are actually going straight to paying for things.
Even if this money eventually gets loaned out eventually by one of NVIDIA's customers putting it into a bank, it isn't NVIDIA inflating the money supply, it's the borrowers, no? Or is this an ineffective way to look at things?