When a bigger entity (e.g. AWS) decides to undercut the original creator/vendor (e.g. redis,elastic search), MIT code des not help.
I know some lawyers who specialize in these choices. Everyone thinks their choice doesn't smell, but there are the resources to make informed choices.
There the question turns to "you may sue me, if it breaks" as reasoning. In reality sueing will rarely work, but having a business contract satisfies the company's board and insurance about using the software over an "AS IS"-license alone.
I don't know how you came to OpenAI as an example given that they famously succeeded while going closed-source with the release of ChatGPT.