For me personally, I don't really care if I will wear paid signature or not as my posting behaviors did't change much before and after the I joined the ChipMixer campaign. Almost all the crypto I have now, I bought, and I don't use the forum as income or to support my family. It's just a hobby which I really like 
I can easily admit I started posting more after joining a signature campaign. It is indeed more or less a hobby, and although I don't need the money, it doesn't hurt to have some spare digital cash either. I joined my first campaign as a Full Member, almost a year after joining this forum, when I had 145 posts:
I don't think I'll reach 50 posts per month, but I don't really mind, I like rollin 
It was a strict campaign, and I've been cautious about my post quality ever since. And that brings me to hilariousetc's quote:I think there are a couple of other things we could do before it ever got to completely removing signatures though such as punishing badly run campaigns
This would really be the key to ending signature spam. Instead of banning all signature campaigns, I'd like to see the results of setting a minimum payment (in Bitcoin) for all campaigns. If it costs real money instead of tokens created out of thin air, the advertising party has something to lose, and has a reason to be stricter.