@briankrebs
I was about to write that LinkedIn never asked me that, but it's because I've never installed any smartphone app for those services.
And regarding Mastodon, what you notice is that Mastodon is not run by a company, so it does not has incentives to monetize everything it can.
@matthieu @briankrebs LI did this too early on. I think they even asked for one's email password in the beginning, to harvest the contacts efficiently.