Yes, the local client part is clear. But for the server part to be self hosted, the vendor would need to know how to reach you / your device.

Currently, they only go "hey, I have a message for user "Justin “! Google, can you make sure they get it?”. And Google takes that message, figures out which backend server your phone is currently connected to, routes to that server, the server hands it to your phone, and then you get a nice ad about CandyCrush or whatever.

If you were to host your own server, there would be an additional layer of figuring out which backend this message needs to be routed to. And for that, every vendor would need to maintain a list of backend and which users / devices are using which. Or, a third party (Google?) would need to offer a service that does this part for the vendor.

This would technically be possible, but as far as I know is not a part of the current “standards” for push notifications.

How would that work? The provider / vendor of whatever app or service you are using would need to know that they need to contact that server to send a notification to your device.

Lifehack for you: since it worked out this time, you can wait even longer next time

Found it:

1. Go to:

<…>\Cyberpunk 2077\r6\publishing\x64

2. Create a copy of the “GOG” subfolder next to the original one.

3. Rename the copy of the “GOG” folder to “null”

4. Go to:

<…>\Cyberpunk 2077\bin\x64

and delete the:

GameServicesGOG.dll"

https://www.gog.com/forum/cyberpunk_2077/a_fix_for_the_crashing/post70

Do you use the GOG version? If so, they changed something about the drm recently, you need to remove some files from the game directory. Then it’ll start working again. Let me check if I can find the reference to that…

Might be for time synchronization in order to not have to rely on a public NTP server.