Yes, this is annoying.
This is public response from LN support:
We all definitely need Opt out option for all published posts notifications, so please send LN feedback to do this asap.
In the future, you can send suggestions by clicking any “Feedback” link, usually found at the bottom or on the right side of most pages. This will send your comments directly to the appropriate team.
Perhaps if we all ask then they might speed up the development of the ‘Off Switch’
Big minus for no option to opt in and out for LinkedIn.
I will post solution as soon as it is launched.