what is these purpose of discussions?

well i think both..

These discussions are very knowledgeable and progfitable also. we can share our thought with lot of people of the world

good question my friend its simple discussion can make your mind wide in all general knowlege

I believe they are only profitable, as most people just make quick, mindless comments to rake in as much as possible. It's unfortunate.

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i looked up for the knowledgeable topics to post

I think this site is both knowledgeable and profitable at the same time because we get the idea of other people and at the same time we earn from the ideas we are sharing.

Some of them are knowledgeable, and some are not.

Good question. I think it's just for profit. I have yet to learn aything new on these. I'm still trying to figure out the purpose.