A few reasons that spring immediately to mind (I'm sure there are others)...

• It's a useful barometer of how you are really feeling day-to-day because Inward Quest is a Hall of Mirrors. If you come to the site and something or someone seems to irk you, that's where you must be vibrating because otherwise you wouldn't have noticed it so much :) On the other hand, if something or someone uplifts you and makes you feel joyful then... etc. etc. :)
• You can't hide who you really are, despite the online anonymity of many (including myself). For some reason here - perhaps it is the longish answers people tend to write, or perhaps the lesser levels of irrelevant chat and noise - it feels relatively easy to get a "feeling" for the "real" person behind the words on the screen. So it's easier to sense here who is being authentic and genuine about the information being provided which helps to separate the wheat from the chaff in these days of information overload.
• It's an excuse to flow energy purely. This is probably my main reason for participating. In trying to write the best answer you can in the moment (without any hidden agenda), you are often putting yourself directly in touch with that broader aspect of yourself that transcends the physical self, and you allow it to flow purely through you during that time. That has an energizing and aligning effect. It's a bit like writing out a Rampage of Appreciation and I use it as a substitute on occasion. So, if I'm being honest, the person who probably benefits most from my long-winded answers is me :)
• It helps others - but since everyone else who enters your experiences is really just a reflection of you, you're really just helping different aspects of yourself :)