Here, You can download the daily domain list for betting websites on a daily basis free of charge.
For each day, there is a separate file except for before October 2020 which we have an aggregate list of more than 6,000 domains.
How do we create this list and how you can contribute?
First of all, the list is created using search engines and in particular, Shodan API.
To contribute in the project, the best you can do for now is to comment/report false positives/negatives.
Please do not brute-force the server and leave comments if you have any suggestion/bug.