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I'm pretty sure that if this rule would be applied to every service that has either broken the rules, exit scammed or just scammed a few users and so on, probably at least half of us would end up with at least one sig ban in a few years, but ....would this not be, at least from a moral point of view, justified?
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The truth is they can do bad things at any moment like many websites can, including my signature campaign casino Spinly.io
If we need to trust the website with our accounts
or with our life, we will never use any signature

With our "life" ? Like ...common...
And I already mentioned that if this were applied to everyone, half of us, this includes me, this is why I used "us" would somehow get a punishment in a couple of years..
I said it's somehow a moral dilemma: are you only advertising something but you do so, earning money with no consequences, and when that service flops or scams or goes dark or anything, you just hope to another one, you can't say at any moment with a clear heart that it has nothing to do with you. I'm not excluding myself from any of those, I was part of CM, it was the most trustworthy mixer, it got seized, people lost money on it...there is a pretty thin line here are it's also full of holes.
Well, you have a point here.
I should not promote a brand that I do not trust. But that's where the question arises. Can you guarantee that a platform won't scam its users?
Nope, nobody can, if all things were clear as the sky we would not have any kind of discussions on the subject here.
I intervened only because of Theymos response, and from one point of view that is justified, of course, one might see as an exaggerated punishment for something beyond their control, but again, anyone can have his own views on things.