This is even more confusing because the org behind Open Collective (opencollective.com) is called " Open Source Collective" whereas the org behind Open Source Collective (oscollective.org) is called Open Collective Foundation.
This post is unfortunately quite misleading : OpenCollective is not shutting down!
The news is just that the Open Collective Foundation, a fiscal host on the Open Collective Platform, is going to be dissolved and that collectives using this fiscal host will have to transfer their funds to another fiscal host.