I don't think his nationality has something to do with his needs for money.
Well some countires are poorer than others but that's irrelevant.
I agree that posting consecutive replies in one topic is another way to boost one's post count--especially if you are enrolled in a signature campaign. But sometimes, this is done for the convenience of other users/readers of this forum.
It's rarely necessary and is often done to boost post count more than anything but at least his posts are constructive and long in length. It would be quite different if they were just short spammy replies.
Post length doesn't really make a post better though. Pretty obvious when people post multiple times in a row they are padding their post counts.