> Now, if you can’t unsubscribe (because there’s no link, it’s broken, or simply doesn’t actually unsubscribe), and this is a legit company, please please please let them know.

I mostly agree with you, but this point only works if the company is contactable. There are some companies sending stuff from no reply addresses.

Those I just spam. At that scale companies need to be testing, if they’ve left no way to be reached.