I had custom filters for a while but I stopped using them, it became unmaintainable and caused some false positives. I then resorted to unsubscribing, but in m

I had custom filters for a while but I stopped using them, it became unmaintainable and caused some false positives. I then resorted to unsubscribing, but in my experience that doesn't always seem to work. I could be wrong here as I haven't kept track of who I unsubscribe from and if I would still get newsletters after the fact. But I've experienced receiving newsletters from some company I could've sworn I just unsubscribed from a few times. However it wouldn't be surprising if some website's unsubscribe feature was buggy. I can also imagine it's not being reported. Or if it was it, and you could figure out where to report to, the report would get lost on its way customer support to the people responsible.