[eterm]

It also contains built in obselesence:

  57.6 Registration; Release. Before distributing your 
  Lumberyard Project to End Users, you must register it at 
  aws.amazon.com/lumberyard/registration. You must obtain our 
  prior written consent if the initial public or commercial 
  release of your Lumberyard Project is based on a version of 
  the Lumberyard Materials more than 5 years old.

[ars]

You are reading it wrong. They say you can't start a NEW game using an old version.

That clause does not require any existing games to be updated.

[Tepix]

That means if you keep releasing updates for a project for 5 years, you need renewed permission from them, right?

[jo909]

Updates would clearly not be an "initial public or commercial release of your Lumberyard Project".

It's about the first version, you just can't sit on your project forever and still use an old version of the engine when you finally go public. I see no harm in that clause.

[cptskippy]

This is probably a way to limit supporting legacy versions of AWS as they anticipate the service will evolve over time. It also means that any game based on Lumberyard might not work past 5 years without continued developer updates.