Time4Tea: I find it interesting to see some people in this thread projecting blame onto Sony, i.e. "Sony doesn't want to release more games on GOG, until they see more sales for the ones that have been released".
Maybe because some people in this thread use GOG's discord, which often has more information than what's available on the forums... actually that information has been passed to the forums plenty of times, but then the messengers get accused of wild speculations lol.
Time4Tea: I mean, we're all speculating, but I think a likely scenario is that Sony has given GOG a list of their games and the advances they would want for each of them. GOG decided to 'test the water' with a couple of the lower-priced ones (makes sense), and GOG/CDPR's execs are looking to see a certain return on that, before they will sign off on paying for the games for which Sony will want bigger advances.
So GOG is testing the waters with casual statements like
"GOW will come out soon after the winter sale" and
"There are some contractual hold ups, the team is working very hard to push it live ASAP"?
So no, I don't think GOG is testing the waters. I think Sony is testing the waters, before they drop one of their biggest IPs here and they may not be very pleased with the sales so far.