You motivated me to check the report, and it's actually really interesting. I was specifically interested in Gwent, and what I did was basically just search for the word "Gwint" and used Google Translate (which was surprisingly good in this case).
From 2nd half of 2016 to 1st half of 2017, GOG's sales revenue jumped to the ~150% level. They emphasize that the open beta stage was the driving force in this.
Polish: GWINTA was the main driving force for GOG.com's revenue growth in the first half of 2017 In the first half of 2017, the product generating the highest value of revenues GOG.com was a thread: The Witcher Card Game.
GOG sales revenue jumped from 60 mln zł to 90 mln zł in 2016 H2 2017 H1
On the revenue side, it is by far the most important product of GOG.com
Public beta tests, which took place on May 24, 2017, and impacted the jump Sales revenue from the project. Earnings from THREADS were The main driver of GOG.com's revenue growth in the first half of 2017 for the same period last year.
Thus the further development of the Group in the near future will also depend From the progress of work on the latest studio project, web game GWINT: The Witcher's Game
sales, it is 38.8% more than in the corresponding period of 2016, which is between others thanks to the launch of a big add on to The Witcher 3: Wild Gon
The most important product of GOG.com in the first half of 2017 was revenue THREAD: The Witcher Card Game.
GWENT's revenue from the GWENT project in the first half of 2017 was higher than the total cost incurred during the same period to promote the game and other costs of the current period associated with this production