Pretty sure that with a permissive license you can just change the license of future versions as you want. Ex. v1 MIT license with thousanda.of contributors, v2 Commercial license with contributions from anyone who agrees to contribute to the new version and license. (Anyone can fork v1 and start their own licensed project)
Plus there’s an old adage by J Paul Getty, “If you own the bank $100, that’s your problem. If you owe the bank $100 million, that’s the banks problem.”
Similarly everyone you owe money to is now invested in your success.