After entering my mail at the bottom of pythondeadlin.es and then solving the captcha, I get this on https://buttondown.com/api/emails/embed-subscribe/python-deadlines: <img width="497" height="270" alt="Image" src="https://github.com/user-attachments/assets/41d9d778-9140-41b9-bf9e-0a03f9b0173e" />
After entering my mail at the bottom of pythondeadlin.es and then solving the captcha, I get this on https://buttondown.com/api/emails/embed-subscribe/python-deadlines: