Maybe one way to remove limitation without purchasing

I can only access limited edition of 30-min Minecraft without purchasing of course. But when I install Forge 10.13.4.1558 first then download Minecraft 1.7.10 via launcher, there're no limitations at all !
I don't know if it is a launcher's bug or Forge's fault, or just Mojang do this on purpose....
However , it is the unlimited MC 1.7.10 with various Brilliant Mods that makes me decide to purchase last week, for the excellent game and to support Mojang. I'm just writing to inform you of my experience and I don't think it is a bug, which makes me admire your work.