Day by day, new members keep registering everyday. Only few of this member find it easy to rank up. Imagine an account opened for more than 2 year that still exist as a newbie..
It's their own choice of whether they want to participate in the bounties or in the signatures. In comparison to the bounty with signature, signature gives you more good money than from joining bounty. If a newbie is registered today on this forum and after 2 years he is still a newbie then he will make money from bounty and maybe he has no idea about the signatures as nobody can tell him or maybe he will not be aware of the rank system as you say they are not reading. But My opinion is that he will be inactive just because changing rank from newbie to Jr one merit is required and it is impossible that in that time period, even a single person didn't give him a mrits. So it's my thought that he will be inactive due to which his rank is on hold.