I'll add a fourth guess for why. You know that "Redactle Unlimited is a big improvement on original-Redactle" shows support for the author of this article, whose game is Redactle Unlimited.
But to someone not paying close enough attention, it's easy to think original-Redactl is the author's game. Then that line can be misread as supporting the copycat over the author, which would be unkind in context. I misread it that way, until I scrolled back to check which one was the author's game.
Ooooh, that's an interesting thought. You could be right.
So, for the avoidance of doubt:
The original original was redactle.com. The creator of that seems to have abandoned it not long after its creation, and to have taken no further interest in it.
The thing we are talking about is redactle-unlimited.com. This was made by berjin. It gives suitable credit to redactle.com. It provides a notably better playing experience than original redactle.com does. I do not consider it a copycat in any culpable sense.
And then there are the copycats of Redactle Unlimited, most notably redactleunlimited.com. That one, so far as I can tell, has simply taken berjin's code and filed off the serial numbers. It offers no improvement over redactle-unlimited.com. It does not give credit to any of its predecessors. It is definitely a copycat in every sense.
But to someone not paying close enough attention, it's easy to think original-Redactl is the author's game. Then that line can be misread as supporting the copycat over the author, which would be unkind in context. I misread it that way, until I scrolled back to check which one was the author's game.