Someone asked me earlier this week if using Steempress was bad for Google ranking, because of the fact that you have duplicate content. I honestly didn't know, and I had to go to the Steempress plugin description to find out that it doesn't affect your rank in Google if you use the delay-feature: if you set it to post on SteemIt 7 days after you have published the post on your blog, the article on your site is indexed first.

I didn't even think of posting only part of the content and using backlinks. It does make sense, though, since backlinks are a very important factor. I see @checkohler is an expert on the matter, so he has already answered your question.

I really need to start posting through Steempress again... :0)