I should perhaps note that that isn't a subsidy to Tesla: it applies to every electric car manufacturer. It's not relevant to the question, which is, "did Tesla succeed "unfairly" w.r.t. other makers?". It's also a red herring for your previous argument about inequality: "Both the Nissan Leaf electric vehicle and the Chevrolet Volt plug-in hybrid, launched in December 2010, are eligible for the maximum $7,500 tax credit." -- these are cheap vehicles.
But yes, now that you've successfully moved the goalpost, I might have to revise my estimate of seventy-five cents.
Does it actually matter? Here the one thing, there the other.
You're complaining about "government picking winners and losers with taxpayer money". The loan isn't a waste of taxpayer money. The subsidy isn't picking winners and losers. Taken together, these two things do not provide weight to your claim: Tesla is not a messiah of the government on the wings of the taxpayers. Or, at least, you have failed to demonstrate that.
But yes, now that you've successfully moved the goalpost, I might have to revise my estimate of seventy-five cents.