That note is so fucking cringeworthy, yet completely in line with the kind of shit I expect to see on this site. First off direct approaches are generally garbage because you are basically spinning the roulette wheel of looks. Does she find you good looking? Then she may go for it and you can show up in a forum pretending your being direct was somehow awe inspiring to her...
Indirect is a waste of time imo. Indirect is for men not confident in themselves or the moment, that's also the style of females in the courtship process. They show passive interest, we as men are expected to be assertive and show our overt interest.
The problem with indirect is quite simple, it makes you the female in the courtship process. Showing overt interest is for men, showing passive is for women. It's fairly simple and very obvious in any nonverbal study of body language.
There is a difference between coming on strong and simply showing no risk over interest and asserting it as a male.
You can walk up and pretend that a girl doesn't know she's attracted to you within the first 5 seconds she sees you but the reality is... she knows when you walk up based on your style, body language, "aura", whether she is interested in them. Now yes your words can certainly help and certainly hurt, however she knows right away whether you're worth a conversation... that said you can simply ask for a conversation if you want to show some interest but not be overwhelmingly overt.
I cringe so much when I see people advertise and market indirect to heavily... I too was a big proponent and yes different moments you use different tactics but... overall make sure you are the male in the interaction so that it can go how it's suppose to.