If the Mojang screen doesn't load and it just goes black, then either your mods are incompatible with each other or with the game.
Check all your mods are up to date and try installing them again with either Modloader or Forge.
If you are not using any mods try forcing minecraft to update before you Log in.
They already bought Minecraft from Mojang. This happened on November 6, 2014.
Mojang....
No. Minecraft is made by a company called Mojang, which originates from Sweden. "Mojang" is the Swedish word for "Gadget".
Yes, because Microsoft bought Minecraft in 2011.
Yes, but choosing your minecraft username is the last step.
No, Minecraft is not a franchise, it is a game. The company which develops Minecraft, Mojang, is a private limited company.
Buying it from Mojang directly.
Notch (or Mojang)
Mojang
Mojang,
Minecraft
Mojang.