They all have access to it... I have a ton of games on GOG and even single developer games without a publisher still use the script... you can get hung up on the terminology, but they all have access to it
If you read that quote, he starts out referring them as "partners" then refers to them as "developers"... it's pretty clear
I do have tons of games on GOG too, some of them with GREAT steam-parity track record. If dev doesn't have publisher, the situation is clear. They are devs and partners at the same time. And all of it is irrelevant to the mess we have here.
I'm not getting hung on terminology, you are trying to twist words to mean much more then they really do. Common sense tells me that having contract and being partner with GOG trumps being dev. Script is not all-powerful, it could prepare package for galaxy, but if it doesn't have credentials for dev portal then it's T17 who has to upload that package. They could of course share their access with Pathea, it would be reasonable thing to do... no idea why they didn't do so yet.
I'm not trying to defend anyone. Just that if there is to be public hanging^Wshaming, I'd like to at least get the right criminal, for something they did or could influence. So far we can rule out GOG, the tools are there. Rest is mess between T17 and Pathea. We have heard Pathea's side and it indicates they DO NOT have that access. Silence from T17 side, except for one patch outdated long before it was released. For the time being, I'm placing blame at Team17.