Noooooo, please just unsubscribe. I only sign up for newsletters I actually want to have delivered to my email but every once in a blue moon I notice that a newsletter went to spam instead of my inbox and invariably the reason given is "It is similar to messages that were identified as spam in the past." which to me means that other people marked it as spam instead of properly just unsubscribing.

I understand that it used to be very difficult or impossible to unsubscribe from stuff, but nowaways it's easier than ever as emails are basically required to have a one or two click unsubscribe system.