We can not deny the fact that there are a  lot of newbies  want to earn a small amount of money by joining bounty campaign and also they don't mind about Ranking that's why we can see a thousands of post and activity but still newbies which means they are focusing on bounty .
But also there are many newbies or even junior member or Member Ranks who are stockup on that position cause the reason of they didn't earn the requirements to procced to the next rank .which means they are struggling to boost thier Rank.