You have to optimize the technique for your purposes. Meathead's version involves specifically creating a review site on its own domain, and concentrating on being one of the first to comment on the latest blog posts related to the niche. This combination permit the comments to have the best chance of staying up (because they are relevant, and link to a legit looking domain), while being useful for both immediate link-through traffic, and long term SEO (as the site page increases in rank and authority over time).
Focusing on writing just 10 comments a day, you could spend a month building 250-300 targeted contextual links this way, then stop and move on to another site. This amounts to a 'set-it and forget it' approach to link building, where you trust the links you took the time to put in naturally build in power to push up the authority of your site.
Your version of the method may deviate from this. Instead of relying on Google Alerts or similar social media alert system to find the new postings, you might just do a Google search of a keyword filtered for "this week" or the last 24 hours. Or you could simply put the phrase "keyword" + "January 2015" + "comments" in the search engine, which should give you the current month's blog postings and comments on that keyword.