my proposal is to lock any thread which is saturated with people saying the same things over and over again. Look at the first page of 'Beginners and Help' or 'Bitcoin Discussion'. Do you seriously think that topics such as
'Post which Bitcoin Wallet you use' or
'How to earn x BTC in x amount of time' really add anything new to the forum, or even the discussion its self, after 1 or 2 pages?
I understand that those types of threads should probably be locked as the only reasonable reply to these threads is insubstantial content, see
here.
2. Removal of signature campaigns will also force users to leave.
As I have said previously, I don't believe that any user who only comes here to earn money is of much value to the forum in the long run. The fact that something like removing paid signatures would cause such a terrible effect on the forum is a perfect example of that.
I am not sure about this. There are many people that come here to earn money who have contributed both to the economy and the community. Many people that come here to earn money do not necessarily only participate in signature campaigns, as some people come here to start/run some kind of business.