Link spamming, bookmarking links socially for your friends, seems to have moved to twitter.
In some ways twitter is better because people can reply and have more options to follow, but in some ways I’m not a fan of this change because the lack of tagging means that it’s hard to go back and find links for a specific topic.
I also don’t like mini-links very much - I want to know what domain something is on before I click.