I have thought long about the same issue and beyond. The triple (wiki, Hypothesis, donations) could be a working way to search for OER, form a social group processing them, and optionally support the creators.

I imagine that as follows: a person wants to learn about X. They can head to the wiki site about X and look into its Hypothesis annotations, where relevant OER with their preferred donation method can be linked. Also, study groups interested in the respective resource or topic can list virtual or live meetups there. The date of the meetups could be listed in a format that Hypothesis could search and display on a calendar.

Wiki is integral as it categorizes knowledge, is comprehensive, and strives to address biases. Hypothesis stitches websites together for the benefit of the site owners and the collective wisdom that emerges from the discussions. Donations support the creators so they can dedicate their time to creating high-quality resources.

Main inspirations:

Deschooling Society - Learning Webs

Building the Global Knowledge Graph

Schoolhouse calendar

To add some other intermediary services:

• ko-fi (site for contribution)
• GitHub sponsors (for GitPages)
• itch.io (for games)
• Gumroad (for sites and repositories)
• Patreon (for fan interaction)

To add a service for groups:

• Open Collective

To add a service that enables fans to support the creators directly and anonymously via microdonations or small donations by pre-charging their Coil account to spend on content streaming or tipping the creators' wallets via a layer containing JS script following the Interledger Protocol proposed to W3C:

• Web Monetization

If you want to know more, head to Web Monetization or Community or Explainer

Disclaimer: I am a recipient of a grant from the Interledger Foundation, so there would be a Conflict of Interest if I edited directly. Plus, sharing on Hypothesis allows other users to chime in.