You are in a very privileged position of getting a phenomenal amount of money every week (0.015 BTC) I believe regardless of how many posts you make just for wearing an avatar and you have been doing it for around 5 years. It is hard to tell whether you use the forum as a forum or as an ATM yourself because we do not know whether you would be posting here and in which numbers if the financial incentive was removed.
You said it, I it doesn't matter how many posts I make. If there is any doubt:I'm not paying you to post
How many members receive 0.015 BTC every week for wearing an avatar without a quota to meet?
A few 
And I'm pretty sure none of them are spamming, which is what this topic is about.Quote
you might not be best placed to understand why some members make ends meet
I'm pretty sure I understand that. When I joined this forum I didn't even know paid signature campaigns were a thing.Quote
I think we all agree burst posting should be happening
You've lost me here.Quote
In many ways, this forum is already an ATM for the majority that use it.
You're probably right. But, on the other hand, the right campaign manager can use that payment to improve the quality:One approach I have taken over the last year or two is that I do these "cleanups" where I remove a number of members in any of my campaigns in order to get fresh blood in, some people tend to get complacent and just post to get paid after some time and this hopefully keeps everyone on their toes.