Re: Where do we draw a line? Signature campaigns or shilling campaigns
I can see from the operators perspective why they wouldn't want this just like if you were advertising for Pepsi they wouldn't want you advertising for Coca Cola or promoting any other drinks but this would all be laid out in their contract and I think it should be the same here and made part of their rules if it's something they don't want.
Yeah but Pepsi can't make you stop drinking CocaCola and saying that you like it (I don't like both btw) 
I personally would never advertise something I don't like, but if you look at advertisement outside bitcointalk it's mostly BS propaganda and people would say anything for the right price
For example, does anyone in the right mind really thinks that Cristiano Ronaldo is actually using Binance exchange?
He is one of the biggest paid influencers in the world but I think he never used it in his life, except maybe to dump some tokens binance gave him for free.
There were cases where individuals criticized mixer services, treated them as harmful, and at the same time carried mixer advertisements in their signature.
There is a word for such people, they are hypocrites.And how about some members who are constantly talking how this service illegal services and in the same time they are wearing gambling signature that is also illegal in their region.
That doesn't prevent them at all to participate in of the biggest spam campaigns in forum.