Hello.
This thread is written directly to the GOG Staff.

I've redownloaded many of my games and noticed that some offline installers have smaller sizes compared to before.
I don't know what you guys have done, but it's nice to see you guys are experimenting with your offline installers to reduce their sizes.

It still isnt the results we can get using 7z commands to compress game files, but it is smaller than before, so thank you for the effort.