AGPL
You can use it for free as long as you open source the entirety of your project. AGPL is "sticky" which means you have to apply the same license to any project you build with TWE & open the project to the public.
Freemium
You can use it for free as long as you open source the entirety of your project. AGPL is "sticky" which means you have to apply the same license to any project you build with TWE & open the project to the public.