Very few companies would risk those lawsuits, especially in Europe the fines can get rather exponential for repeat violators and I don't think it's much different in the US either. If the unsubscribe works, that is the end of the story for me, and a reminder to check for small newsletter checkboxes when signing up to things.
I very rarely get marketing mails from any reputable company that are completely unsolicited. In most cases it's a followup from trying out an offering or updates to products I'm using or are adjacent to those. If I'm not interested, I either ignore them or unsubscribe if it's repeatedly not interesting.
This is a much more effective "spam" strategy compared to "all HTML is spam".
I very rarely get marketing mails from any reputable company that are completely unsolicited. In most cases it's a followup from trying out an offering or updates to products I'm using or are adjacent to those. If I'm not interested, I either ignore them or unsubscribe if it's repeatedly not interesting.
This is a much more effective "spam" strategy compared to "all HTML is spam".