It is weird that your enterprise features are not self-hostable even if a customer pays. I understand if some features are not open source, but why make it not self-hostable? Self-hosting is a requirement for confidential data.
>>latefo+(OP)
The enterprise features are self-hostable. Look at "your servers" on the pricing page for Grist. Individuals (and orgs with < $1 million in annual income) quality for free activation keys btw.