How is it financially prohibitive to pay a researcher a salary to find a 0day like this, where the bounty programs pay $100k-$500k on 0days on the same ? sourc

How is it financially prohibitive to pay a researcher a salary to find a 0day like this, where the bounty programs pay $100k-$500k on 0days on the same ? source: https://developer.apple.com/security-bounty/payouts/ https://developer.apple.com/security-bounty/payouts/