HunchBluntley: I don't know if they yet
have a process for auto-generating standalone installers
You don't need to know that you know. Setting up such a tool chain would be business practice (goes normally like: do what is most cheap) before even building a web site to sell the suckers. Do you think they have monkeys with pressing on the "build" button of the msi creation tool all day?
HunchBluntley: but the fact that GOG tests most updates
Again, which makes that how relevant for the difference in releasing offline installers compared to the content in galaxy?
The testing process is also done for the stuff they release on Galaxy. And if it was not, there also is no reason to do that for the offline installers as that would make for a support nightmare to have the same customer with two different versions of the software.
You can tell me all you want and I'll deconstruct every reason for the offline installers to be delayed compared to the galaxy version as lies using logic.
Klumpen0815: Current Linux market share is ..
That's always bullshit. One default feature of Linux is precisely to not register itself. If someone thinks otherwise (cough fixubuntu.com cough) his product will be promptly replaced. So _nobody_ knows. Though at least from my experience at work nearly everybody who is experienced in IT and is allowed to make his own choice uses it.
If someone really wanted to know how the "game market share" of Linux compared to Windows would be however, he, as a big game producer, should release his online game Platform-Wide. So far I've never seen that. Would feel nice to play e.g. Overwatch on Linux though. It's real hen-eggy still. Will be better in time after a while prerequisiting big companies actually have moxie to try something out. So never :-)