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They are but they do not provide the ability to respond and get dialogue going.

Once in a while, it is fine but the numbers add up when people "converse".

Do it back and forth 10 times and suddenly there are 20 more comments.

Yes that is the big loss, when we do real engagements the dialogue continues and we get to see alot of valuable threads without putting much efforts as for us it is just a normal convo that is going on.