This is also very annoying to this story.
https://lumendatabase.org/notices/15...request_access
When you like to get more information you can only do 1 request per 24 hours per email address. I have asked for a researcher account and got this answer:
"Thank you for your letter and your interest in working with the Lumen database.
At this time we generally issue Lumen researcher credentials only to people or non-profit organizations planning journalistic, academic, or legislative policy-focused public written research outputs.
Lumen is an academic research project, not a service, and should not be part of any business model. Businesses interested in takedown notices referencing their sites that have been sent to other OSPs should investigate webmaster and/or Search Console tools, or contact those OSPs directly.
We offer limited access to notices to individual members of the public - 1 notice per email address per 24 hours. In order to manage Lumen resources and mitigate misuse of the site, we also block historically problematic IP addresses and email domains.
Sincerely,
The Lumen Team
"