If you have been using WordPress for a long time this may sound dumb since you may had this option for a long time, I just discovered.
Tumblr is the biggest competition to wordpress, one of its key feature is the “reblog” where you can just reblog a post and have it in your blog. So, we can see blogs that are entirely reblogs, from multiple sites and sometimes it is easier to just follow that blog because they have information from multiple sources you don’t have to be looking for.
So, if I post to twitter, to me is good to share via my blog, so you can visit my blog too.
“Press this” is not just a “reblog” system, I can add text so I can add a comment to that post, so I share that post, and since I add my point of view and more importantly I’m adding a link to the source I’m not stealing any content.