@actmyname

Your logic seems sound at first glance and that's kinda how Chipmixer runs their campaign, except that they have a rather high max. posts per week.
If you look at all the other p/w campaigns out there, they pay way too little to be worth it for high-quality members.

I'd really like to see more signature campaigns abandon their current f/w model and switch over to p/w.
The problem with that though, is that it's probably a lot more labour intensive for the campaign managers.

I have no idea what the going rates are for campaign managers, but I reckon that expecting them to actually perform a more in-depth analysis on every post, would cause them to up their rates. If any campaign managers are reading this, I'd love to see your take on this...

On a side note: It is kinda ironic that a non-gambling campaign (Chipmixer) is currently offering the best paying signature campaign, by utilising the most lenient model with regards to post requirements. When I say lenient, I do not mean regarding post quality, but rather post frequency. You wouldn't think that a niche service like a coin mixer could "outbid" mainstream services like casinos, when it comes to signature campaigns.