Filesizes and how much bandwidth GOG is willing to provide to your ISP / location.
CDN roulette (you made a thread on this a while back BTW).
Time of day.
Amount of users downloading those files at that time.
Whether or not you farted in the general direction of Warsaw... should I go on?

Please do. Pray, continue.

Might shart. Then we're all fubar!

ok so is definitely something related to gog servers. I don't have throttled connection, I'm trying to download withcer 3 which is like 80 Gb or something, the first four bins files downloaded at max speed, the fifth doesn't want to go more than 600kb I've tested the network speed and it works as expected.

the gog introduced some sort of speed throttle themselves. trying to pause and restart the connection jumps the speed from gog to max speed for a few seconds then goes back down quickly. So is definitely gog at fault.

I am so glad I saw this post b/c I thought I was going mad and was cursing my provider and vpn that is otherwise a very good payed for version.
I was buying a lot of games recently and have been dl the offline installers, and I was pulling my hair looking at the numbers and how long it took, then randomly 15 min later the speed was acceptable. Then sometimes a complete standstill.

Some vpn adresses were better than others ofc, but I always select the best ones for when I dl, and normally have no real issues normally for all other stuff I dl outside of GOG (ofc vpn dl speed is worse than without vpn but still)

Glad it wasnt just me and that it seem to be a known GOG issue now :D

I am still happy with it and the offline installers they offer us, yes the speed can def be improved but I am grateful its an option vs what steam etc has to offer.
Its prob not easy or cheap to maintain all this stuff, and prob also take a lot of time to make games avaialble in that form so its ok for me now that I know its not in my end:)

Remember, once a company etc goes big and mainstream, we get a lot of the bad along with it too!

But yes, I too would love more than 2 mb dl speed tht I saw on some of them, or even some that were less than 1mb :)

No, this is a GOG issue. I downloaded all of those examples one right after the other, and then I just redid it again and got the same quick speeds for the games above, and the same slow speeds for the ones listed above. Gog is doing something with specific games, and I'm guessing it's as a poster above suggested... make sure the popular games are fast while throttling the less popular ones.

And for today's example of "Wait, did that really happen?"

I had an issue with Comcast and so went on the forums and was greeted by an employee who transferred me to DM. Get this, they upped my speed from the 600 Mbps to the 1Gbps. Everything else the same, and my bill is $6.00 (Edit, math is hard. It's actually $16.00 less, even better.) LESS per month.

I really must be asleep and this is a dream.

EDIT: So I just did a couple of speed tests, and I'm not getting the 1Gb/s but I am getting faster speeds than I was before (It was averaging between 650 and 700 or so) and now in all of the tests I just did this was the slowest (screenshot), the others were about 900, not quite 1Gb/s, which is still a bit faster than I was getting AND my bill every month is LESS.

EDIT 2: To be consistent I just did one using Oakly as well, about the same. (second screenshot).

And here's Mars War Logs from gog, just as slow as it was in the post above. (third screenshot).

I guess I'm going to have to break down and install Galaxy after all. I had been curious to see it over the years but man I never forgot the feedback I read several years ago that it left stuff on computers after uninstall that really affected some stuff. I dunno, maybe just move to Steam for good. Everywhere. EVERYWHERE but here. Any other website I've downloaded from is faster than this. Not. A. Single. One. This. Slow. At least that I've encountered.

It's not ISP. It's not wifi, It's not traffic. IT IS GOG. Period.

it appears to work now, lets see how many of those bin files i can download, 14 to go

So i am COMPLETELY CORRECT in the first thing I said. Amazing!
Come on lad.

Maybe gog should start a second donation jar for a better CDN? *shakes cup*

gog should add one of those "services status" page that shows the status of the website various parts. if you never seen one of those pages, basically this https://metastatus.com/

My own experience before the loss of download speed with GOG, was download speeds did vary a bit, depending on the game and the OS version, and also time of day, etc.

But since I started getting a lousy download speed with GOG, nothing really varies, though it can get worse during the height of a big sale.