What happens if the discussions I've started do not receive any response

No idea friend, But certainly earning will be less.

Your earnings are not affected. You aren't paid on here based on how many responses you get! I hope you aren't under that impression?? If so, mylot doesn't work like that. They pay you based on your discussions/responses that YOU add to the website. Just be sure your responses are about quality..not quantity! Good luck! :) You are doing good so far.

You won't make anything from your discussions until 1 person leaves a response. So unless someone responds you won;t get paid anything for that discussion.