So GOG's sales increased by 60% year on year (page 25). Selling costs have gone up (Gwent related?) - according to that report, GOG's profit from a $9.99 purchase is $0.07.
From page 35:
With regard to revenues, the most important product offered by the GOG.com segment in the first thiree months of 2017 was GWENT: The Witcher Card Game. GOG.com revenues associated with GWENT in-game transactions represented an important component of the segment’s Q1 revenues, compared to the corresponding period in 2016.
About GOG sharing the burden of Gwent:
The company also intends to reach new customers through GWENT: The Witcher Card Game – this game
requires the GOG Galaxy client, which also provides full access to the GOG.com store. In future reporting periods GOG.com will undertake marketing campaigns specifically targeting GWENT players, with the aim to display the full product range offered on GOG.com. Adding support for further language versions, currencies and payment channels is also being contemplated.
GOG.com financial results will be strongly affected by sales of GWENT: The Witcher Card Game. GOG Poland has established a consortium with CD PROJEKT RED to carry out joint development of the game. In the framework of this consortium GOG.com is responsible for all online gameplay features and matchmaking. Consequently, a portion of the game’s development costs and revenues are attributable to GOG.com.
On 15 May 2017 the Management Boards of two companies wholly owned by CD PROJEKT S.A., i.e. GOG Poland Sp. z o.o. and GOG Ltd. undertook resolutions whose purpose is to effect a merger between said companies. The process involves a cross-border merger between GOG Poland Sp. z o.o. (the Acquirer) and GOG Ltd. (the Acquiree) and transfer of all operating activities of GOG Ltd. to Poland. This is done in order to simplify the organizational structure of the CD PROJEKT Capital Group.