With open source to realise funding one has to provide something more. In the Wordpress model the code is open source and they have a commercial arm that manages the development and offers paid for hosting.
Some component of Codidact could be paid for. Perhaps a directory of private sites that is catalogued at the head office but searchable through them and supporting cross links and such.
If these sub licences that use the same code off site that want to be linked to the main site could support the infrastructure costs it would provide a stable base.
Non profit and hobby sites could link for free perhaps.