So tl;dr, if you're planning to pay yourself a full time gamedev wage, the difference between Lumberyard and Unreal is ~$300/month
Well if you put it that way maybe the price should be considered, if you feel that a good interface and user base isn't worth $300 or more then using Lumberyard is the better deal.
I Downloaded Lumberyard again, a pain as it is huge and there are a few hoops you have to jump before it runs, just to see how it is again, underneath it has almost everything Unreal has, I would go so far as to say that they are infact on par with each other.
The size is annoyingly large Unreal is >15 GB and Lumberyard is > 40 GB Most of that is pre-made assets that will be great for testing; but developers never use these for there actual games just as no artist sells a model with the 3ds max pre-made materials attach.
Underneath it has most of the same things Unreal does, there is nothing that I feel justifies switching.
Digital retailers typically take about 30%
How is that not considered theft, 30% for retailers 30% for tax, you get less than half of the money you earned.
As a artist our retailers gets a 10% cut, even then we consider it too much.