In my naivete this is how I’m thinking about it, why I think it’s ok…
I’m not taking the full post-just a long enough, and juicy enough bit to whet the appetite of the reader and to let them see that the author is the real deal. In the rare instance I do take a full post, it’s because it’s short but deserving of attention and either to a blog that is just getting started, OR their ad is in the post footer. The link back to the original post is front and center. And lastly I’m not running any ads.