Ideally, the old servers would have (1) paid for themselves, and (2) generated a reasonable amount of profit, before they became so obsolete that the market demands drastically reduced prices. A high revenue stream from that server after that point should never have been part of OVH's business model in the first place.
A host that expects customers to keep paying the same monthly amount for a 2-year-old server is no different from a rotisserie that expects customers to pay the same price for last week's leftover chicken. If the rotisserie's business model depends on selling stale poultry at a higher price than what the market would bear, it is clearly unsustainable and deserves to have its revenue reduced.
A host that expects customers to keep paying the same monthly amount for a 2-year-old server is no different from a rotisserie that expects customers to pay the same price for last week's leftover chicken. If the rotisserie's business model depends on selling stale poultry at a higher price than what the market would bear, it is clearly unsustainable and deserves to have its revenue reduced.