Glyph fortune telling?

Recently I heard about a weird phenomenon - people are using Machina portals to tell their future, or get some kind of guidance.

The practice, as I understand it, requires a combination of a few things:

1) Machina portal, doesn't matter which level.

2) Full XM bar, nothing less.

3) First hack of the day.

The rest is simple - ask your question and glyph-hack the portal. The glyph sequence is your answer. Currently I'm not sure whether you must repeat the sequence successfully or not, I think it doesn't matter.

I'm also not sure how to decipher the answer, some glyphs can be very cryptic.

Did you try this practice? Or heard about others using it?