It definitely looks like the effects of Goodhart's law [0] operating internally, somewhere their KPIs are measuring just the clicks, views or e-mails sent instead of the spirit of those actions (engaging users, turning passive users into active ones, etc.).

LinkedIn turned into a place where I go to answer some messages that could be good opportunities in the future, and only when I don't feel overwhelmed by recruiters' contacts.

[0] https://en.wikipedia.org/wiki/Goodhart%27s_law