it is very simple because they don't need some post spam and low quality,this forum need more quality than quantity; I am so sad when everyone use rank junior with no merit to do bounty,there are so many people do bounty with this rank,it make big number post spam and low quality,if you come this forum to learn knowledge, share experiences, good attitude... it will be different than you just do bounty,I think this changing is very great,it restrist spam post and low quality post,if you want to be up rank,you have to try harder to get merit from admin