I do not think that the problem is with the forum owner. If you can make 400 to 500 threads then only the question of paying this amount arises. I do not think that it is possible for anyone to make this many threads in a day.
Another thing is that mylot is strict about English language and spellings too. So if we make mistakes, then also our chances are reduced.
Third thing is that the threads/responses should be meaningful and that is not so easy task. Logically so many things are possible but practically not.