Building links on sites that publish content on a regular basis is easier than having someone change hard coded content. Blogs need to publish on a regular basis or they will lose their audience.
Luckily, you can find most of the blogs linking to a competitor using Screaming Frog.
For the most part, Filter 1’s export will be all blogs, and filter export two will be everything else.
For Filter 1’s export, I like to format it into a prospecting pivot table and add all of the high value link targets I find into Buzzstream.