I purchased this product somewhere beginning of 2021. First of all this product has changed it's name long time ago and haven't bothered to update it here. Lots of people problems activating their licenses year back and now there is a fresh question about the same issue.

As you see from their changelog at https://wordpress.org/plugins/wp-scheduled-posts/#developers not to much has happened this year. I doubt they have any plans to make the product better.

My biggest issue with the product is that it doesn't work with Editor or Author roles. I requested if this feature could be added and I was told that the suggestion has been taken to the dev team and haven't heard about it since. Also they don't have any kind of roadmap so you could see what's under work.

If you are fine working with the current limitations go for it but don't expect any new features.