i don't understand this ?

You are right dear friend.Actually most of the people over here are just for making money and not for serious discussion.They want to make money by hookor crook.as we all know that we get more money on starting a topic rather replying to others' topic.So now there are people who don't even read the responses to their discussions,I mean disscussions started by them only.So you can yourself undersatand that the people like these would never mind to start just any kind of disscussions and hence you will find many of the similar type disscussions.

i can understand ur frustration, as i have experienced it a lot. One thing that u can do is add lots of friends and hope that they respond to ur discussion... The number of responses that u get also depends on the timing of the post.. For example if u are starting a discussion when there are least number of users online , then obviously u would get very few responses...So try to stick on for as long as possible and try responding to as many discussions....