Lately I've been getting ridiculous download speeds with GOG. Currently looking again at some 0.1 (!) to maybe a few Mbps, on my c. 90 Mbps connection.

Just a heads-up if nothing else, or maybe someone can tell us what's up. I suffer no such problems with e.g. Steam.

You can Disable IPv6, set your DNS to Cloudflare ("Setup on PC" section near the bottom), and restart your system.

If it doesn't make a difference, open a support ticket, if you haven't already.

I think I'll get me a postbox and have GOG send me their updates by snailmail ;)

I had same problem, but weird thing is that is only effected a couple games I was downloading. one game was downloading slow. but I changed que and the other game downloaded fast. switch back over to other game and slow again...