I consider a long term PPA a hedge against near term volatility. C.f. https://www.fia.org/marketvoice/articles/derivatives-markets...
In any case, let's assume OVH had engaged in a hedge transaction betting that energy prices would go up. That would have positive value for them. But the hedge would be settled financially.
It would not limit OVH's marginal cost of electricity. And your marginal cost is what matters when you're setting prices.