I recently started to receive emails with: "New skill available: Puzzle solving" Begging me to compete with colleagues. Oh, what they have become... I have unsubscribed from their emails now.
Good luck actually unsubscribing from LinkedIn emails. The dark pattern they employ (or at least used to employ, for many many years) is to just periodically add new "categories" of email to send you, that you haven't yet unsubscribed from. Back in ~2015, out of frustration I changed my LinkedIn email to a throwaway
Now debating whether I should delete it altogether.