To satisfy my curiosity I really want to know why some campaigns don't give this due diligence and others does and what is the reason behind it?
Some things are based on project demand and not entirely on the management side; in some cases too, it's based on the budget which the CM has at hand to use and organise the campaign, which it will either be too small for them to split and say Snr will get paid this amount and H/L this amount.
I believe this thread should be on the service board and not Meta since you are talking about signature payment and ranking.