If you're prepared to pay market rate for someone to maintain something you should always be able to find someone willing to accept market rate (by definition). This separates the cost of maintenance from costs flowing from rent-seeking behavior.
Arguably industry is always willing to pay, in aggregate, the cost for free software to be maintained, but is not willing to pay, despite the optimism of those who sell it, for the marginal utility it gives them per-customer (which should be much higher). When asked to do so they will simply support free-as-in-beer or cheaper alternatives until one of those becomes the dominant player. This is why successful and heavily commercialized free software projects often seem to be only just clinging on to profitability (eg Docker).
Arguably industry is always willing to pay, in aggregate, the cost for free software to be maintained, but is not willing to pay, despite the optimism of those who sell it, for the marginal utility it gives them per-customer (which should be much higher). When asked to do so they will simply support free-as-in-beer or cheaper alternatives until one of those becomes the dominant player. This is why successful and heavily commercialized free software projects often seem to be only just clinging on to profitability (eg Docker).