Originally the project was a closed source budgeting app to compete against YNAB on privacy and cost but the developer got overwhelmed and decided to open source the project.
I can’t remember all the details why the project doesn’t have access to the .com domain still, but you can use the .org site to see the details/source code. (You can also see the .com address hasn’t been updated, and still has the original 2020 copyright date)
Regardless, this is a thread about self-hosted open-source budgeting, which is why I linked to Actual Budget. I have updated the first post to be the Github link instead to prevent confusion.