Sgt_Kickaxe - 8:41 am on Jan 30, 2013 (gmt 0)
I'm seeing the tactic mentioned in the opening post working for rankings even if the pages with the promised content are not on the same domain.
There are 5 specific and independent tools being used in my niche, created by 5 different companies and hosted on 5 different domains. About a year ago one guy wrote an article about the subject of the tools and he links to all five of them within the article. His title is misleading, you end up thinking the page will have the tools you want, and he is undoubtedly bouncing visitors to these other sites BUT he is also ranking #1 for the keyword term people use to find these tools, ahead of all five companies.
My take is that linking to related content in general is a good idea, on your domain or not. If you need more incentive to link out I don't know what to tell you but in the bigger scale this topic is tightly knit with the one we're discussing here. Which comes first?