Anyone having this issue (even before this sale?)./

Had been using the gogdownloader for months and even that seem to be showing slower downloads than normal even before this sale. Since downloader has been discontinued had to use browser and speeds dropped a lot. Everything else seems to be fine, but gog specifically im having an issue ....

anyone else with similar problem?.

Ping latency (in time), or "Packet Inter-Networking Groper" isn't directly related to bandwidth, that's a common myth. ICMP packets are an old way to "map" paths between routers, and doesn't tell you how applications using TCP or UDP will perform.

The internet consists of 1000s of networks, and most routers is set to use low priority on ICMP echo request (and some have turned it completely off), unlike TCP/UDP.

Packets to and from the server(s) can take different routes. Alas, you won't be able to determine speed from a traceroute, only latency and possibly packet loss.

You are completely right, ICMP != TCP/UDP, latency != bandwidth, etc.

But as he is observing problems from Australia,
while it seems pretty fine from Europe,
I guessed the problem may be in his route (from overseas),
which could have influenced both, ICMP and TCP/UDP.

If you find a hop on your route where you're losing (ICMP) packets or the (ICMP) latency rises significantly,
it as well may slow down your TCP connections.

(And you could use a traceroute variant which supports tracing via TCP SYN, e.g. `mtr --tcp`.)

I should have been clearer; it wasn't directed at you, just a "watch out" for others traversing through here that doesn't know... :)

On Saturday I downloaded about 200GB worth of my GOG game installers (updates and new games). Downloading four files at a time, at least occasionally I got a combined 300 Mbit/s download speed. If downloading only one file at a time, I didn't seem to get quite as high download speed. My internets is 400 Mbit/s.

Yes, I am facing quite slow download speeds as well, in Kbps instead of Mbps. Its been happening the past couple of months. Other things like youtube run as expected.

Have raised a support ticket.

Greetings, Yeah me too!
It's really weird, it used to download at full speed, but now I get ISDN speeds. Attached is a screenshot of the speeds I'm getting.
The weird thing is, that if I use GOG Galaxy, it some times work fine (most of the time), but here on Linux-land, that program doesn't run that well, so I try to avoid it.
Another thing, if I use Lutris or GameHub to download/install from gog, it ends up download at 0.0kbps and the time remaining appears to be like six thousands years and some.
I use Firefox, but I tried on Opera and the speed is the same.
My OS is Manjaro KDE.