You are missing a link at the top to be able to purchase this. Or at minimum, the AGPL Affro license banner. While your source code is open, there can be a hefty price, depending on how it is used, under this license.
You are also not allowed to accept PR's that include code without the submitter becoming part owner. Including bug fixes. Could you verify that a single entity still owns this product?
That being said, this looks to be an awesome product. Too often this gets licensed as mit and the project loses the funding and investment. Keep up the great work!