First off some sad news. My ProtonMail Account Creator will no longer be continued due to exessive account banning. Even after fixing the script and adding more anti fingerprint messures accounts created with this script will be banned instantly.
However, I have created a new script in the same repo. The new script is able to create endless amounts of free Yandex.com email accounts. The only thing you need is a 2Captcha API key and some HTTP Premium proxies with user and password auth.
So now I am happy to release this first version of the script. It still has some issues but I was able to create 500+ accounts in a few hours with the current version. You will be able to find this script on my Github account.
Link list:
2Captcha - affiliate link
Webshare.io - affiliate link
Github Repo - Download the Script