Generated with sparks and insights from 8 sources

Now I have comprehensive information to provide a detailed list. Let me compile the final response:

Based on extensive research, here are independent discussion platforms for digital preservation and data hoarding that exclude the specified restrictions:

Academic & Professional Mailing Lists

JISCMAIL Digital Preservation List
https://www.jiscmail.ac.uk/lists/digital-preservation.html
Global academic mailing list for digital preservation announcements and discussions. Email subscription only, no major tech company accounts required.

Michigan Digital Preservation Mailing List
https://mail3.mcls.org/mailman/listinfo/mi-digital-preservation
Mailman-based discussion list. Requires email subscription and moderator approval, but no major tech accounts.

DIGLIB - Digital Libraries Research Mailing List
https://mail.iflalists.org/wws/info/diglib
International academic mailing list for digital libraries research and preservation discussions.

H-Net Academic Networks
https://www.h-net.org/
Extensive network of academic mailing lists covering digital humanities and archival topics. Email-based subscription system.

Independent Web Forums

Academy Digital Preservation Forum
https://academydigitalpreservationforum.org/
Independent forum platform focused on digital preservation best practices and innovations. No major tech account requirements.

Simple Machines Community Forum
https://www.simplemachines.org/community/
Traditional phpBB-style forum discussing forum software and including archival topics. Simple user registration.

iNaturalist Community Forum
https://forum.inaturalist.org/
Discourse-based platform with active data hoarding discussions (e.g., "Data Hoarders Anonymous" threads). Standard forum registration.

Software Preservation Network Forums
https://www.softwarepreservationnetwork.org/category/resources/forums/
Academic/professional quarterly forums on software and digital preservation topics.

Professional Communities

AAM Community Forums
https://community.aam-us.org/
American Association of Museums community platform with digital preservation discussions. Professional membership may be required.

Society of American Archivists Connect
https://connect.archivists.org/
Professional archivists discussion platform. Requires SAA membership but not major tech accounts.

ArchivesSpace Community
https://archivesspace.org/resources/user-resources/archivesspace-forums/
Open-source archives management community forums and discussions.

Usenet Newsgroups

UsenetArchives.com
https://www.usenetarchives.com/
Web-accessible Usenet archive with searchable interface. Read-only access to historical discussions without registration.

Traditional NNTP Newsgroups:

• comp.archives (computer archiving discussions)
• alt.archival (alternative archival topics)
• Historical preservation newsgroups via independent NNTP servers

Community Portals

DigiPres.org
https://www.digipres.org/
Community gateway to digital preservation resources. Links to GitHub discussions but viewable without GitHub account.

Digital Preservation Coalition Community
https://www.dpconline.org/
Professional organization with community resources and discussion opportunities.

Traditional BBS & Forum Networks

Independent phpBB Forums
Various independent phpBB installations discussing digital archiving - discoverable through web search for "phpBB digital preservation" or "phpBB archival forums"

vBulletin Community Discussions
https://forum.vbulletin.com/
Traditional forum software community with extensive archival and preservation discussions in their support forums.

Access Notes:

• Mailing Lists: Most require only email subscription; some have moderation
• Web Forums: Standard username/password registration, no phone verification
• Professional Platforms: May require professional membership but not major tech accounts
• Usenet: Accessible via web interfaces or traditional NNTP clients
• Archives: Many provide read-only access without registration

These platforms maintain independence from major tech company authentication systems while providing active communities focused on digital preservation and data hoarding discussions. Access is typically through traditional email subscription or simple forum registration processes.

Sources: digipres.org1, Academy Digital Preservation Forum2, JISCMAIL3, iNaturalist Forum4, Simple Machines Community5, Software Preservation Network6, UsenetArchives7, H-Net8

Appendix: Supplementary Video Resources

<div class="-md-ext-youtube-widget"> { "title": "Digital Preservation Theory 101", "link": "https://www.youtube.com/watch?v=r8ZIB8vZcI0", "channel": { "name": ""}, "published_date": "Dec 15, 2024", "length": "46:49" }</div>

<div class="-md-ext-youtube-widget"> { "title": "Digital preservation resources for a global community - Robin ...", "link": "https://www.youtube.com/watch?v=QLW9FfQ6RXU", "channel": { "name": ""}, "published_date": "Mar 3, 2024", "length": "24:30" }</div>

<div class="-md-ext-youtube-widget"> { "title": "The Academy Digital Preservation Forum with Andrea Kalas", "link": "https://www.youtube.com/watch?v=gF6dePmhbmE", "channel": { "name": ""}, "published_date": "May 8, 2024", "length": "1:19:17" }</div>