> We came to the determination that users unfamiliar with the whole Faker situation wouldn't know that the repository's sponsorship links aren't funding the continued development of the project.
If the intent of the supporters was to support the project, then you can ask them to continue funding the new fork. But you don’t just move funding by default. Cancelling the ongoing support would be fine, but you are relying on people (who were never aware of the switch and the new fork) being okay with this, without their consent.
This is a messy situation, but you can’t make these decisions unilaterally. Inform the supporters and let them decide.