Method
Our goal is to avoid writing generic comments that are obvious Scrape Box comments, and look like we have read the article, even though we haven't. I am not talking about writing ass kissing...thanks for posting, I came to you from bing, I found your article in google and wanted to say thanks shit. I am talking about targeted comments.
How
Smarter scraping, and using search engine operators - think of a popular topic... or article title idea....in this example I am going to use the term "Top 10" then combine it with something specific:
intitle:"top 10" "Wordpress themes"
Now this is going to find a whole heap of articles that are top ten lists about Wordpress themes. These sorts of articles are very popular, Google says there are about 13,000 results for this term. Notice I used the search engine operator "intitle:" to ensure that the Top 10 part was in the title of the page. I could also have put a intitle in front of the Wordpress themes part, this gives 300-400 articles with both terms in the title.
Now we have a list of articles, and now have a pretty damn good idea what's going to be in those articles too because it's obvious...so we can write a 5-6 comments about the article that will almost certainly get approves.... i.e.
"What a great list of Wordpress themes. I am always on the look for new wordpress themes, and your list is great starting point. Lists are so useful! Thanks."
"Wow, you have listed some very cool Wordpress themes here, just been checking some of them out, and there are some impressive themes in this list. It's amazing how many great themes there are out there for Wordpress."
You get the idea.
Why it works
The key part of the above idea is to use the search operator intitle to ensure you know your term is in the title, and as a result you have a high likelihood of providing an on-topic comment.
I find movies are good, top XX lists, I am sure you can think of more.