How is it blog spam? I assume buffer posts are blog spam equally? If anything, I learnt a few new things here such as the 'all in one stage' or 'break it into multiple stages' slide. Hardly blog spam.
This is different from the typical Buffer post.
Top 10 lists are almost unequivocally blogspam, as it's usually a list of things without much depth and insight (including this submission). A Top 100 list is worse. (how can you do a comparative analysis on 100 entries anyways?). A subset of a Top X list is even worse.
If the article is obviously blogspam, flagging will correct that very, very quickly. As was the case with this post, which hit #10, then went off the front page in less than one minute.