First, many publications from OSNOVA are driven by requests from readers. I specifically received a request for this text.
Second, the German Bible Society
claims copyright in NA/UBS text and has
shut down several projects based on "their" text (and
here, and
here). I suspect their claim will not hold (at least under U.S. copyright laws) in court but I don't want to be the one to test it. So, basically, NA/UBS text cannot be used by folks like me.
Third, I was personally interested in the Byzantine textform because I find Robinson's arguments more persuasive than the arguments for the eclectic text of NA/UBS despite the consensus of textual critics to the contrary.
I would still publish NA/UBS text if I could but see #2. I may in the future publish SBL GNT but it will have to be free per their license (I am still reviewing their license for details what can and cannot be done with the text).
Wescott-Hort and some others are in the public domain but they are dated and I have not received any requests for those.
Also, don't forget that Robinson/Pierpont apparatus identifies main NA/UBS variants.