This is the best way. If you can engage in multi-layered comments with the author, giving and answering questions, it would be the best. This is very hard to do. But, if you can do it successfully, you have successfully made a friend on Steemit.
That's right, apparently everyone has his or her own techniques when it comes to commenting. Bottom line is whenever you're commenting on a post try as much as possible not to make it too short, else it will be counted as a spam and therefore attracts flags. Thank's for your contribution. Good luck!