Now that Unreal Engine 4 is free for everyone, Epic should update the Common Questions and Answers page. 
Hi ryanjon2040,
Thank you for your request. I have entered a feature request, UE-11651 to be assessed by the development staff.
It seems to be updated but still these two questions are not.
Q: How many computers can I install UE4 on?
Q: What about Linux?
They both mention subscription.