They mentioned that they're green because the don't use freon. Great. Most compressor based heat pumps have used something greener than freon for years. AFIAK, compressor based heat pumps are still WAY more efficient than a peltier. So if you replace a cooling gas with a 400% increase in power usage... You lose?

Doubtful... I'm sure the support agreement will only include those parts of the distribution which Oracle deems to be a requirement for Oracle's product. MySQL clearly doesn't fall into that category. My guess is that only a small subset of the full RedHat distro will be covered.