I have some apps which show me promotional notifications of new features, deals, etc. I know I can turn these notifications off, but I tried disabling the app running in the background altogether instead (Android 10), so it does not run at all by itself unless I start it explicitly.
Apparently, some of these apps still send me suprise notifications from time to time. How is it possible? Can apps still work and send notifications even if they are not started by me and cannot run in the background?