Not a fancy blog post, but I just discovered that subdomain takeover is possible for "readthedocs."
What is a subdomain takeover?
It is best explained here. https://github.com/EdOverflow/can-i-take-over-xyz
What is "readthedocs"?
Read the Docs is an open-sourced free software documentation hosting platform. It generates documentation written with the Sphinx documentation generator.
How do I check for subdomain takeover over?
Any subdomain pointing to "readthedocs" but not claimed would throw an error like in the screenshot below.
How to takeover?
1. Signup at https://readthedocs.org and click on Admin settings
2. Add the repository https://github.com/readthedocs/template.git or fork the repository if you wish to make any changes.
3. Add your repository at "Repository URL:"
4. Click on "Domains" in admin settings and add the domain.
P.S I wrote this blog because I didn't find it mentioned at https://github.com/EdOverflow/can-i-take-over-xyz