based on that website, it sounds like this whole thing is a marketing campaign for that mailscarp service. They don't actually want you to read their newsletter, they want you to go investigate and then sign up for their 'block spam' service.
Not only are they a terrible service that lies about their data scraping, their service also doesn't even work. I entered one of my random email addresses that can definitely receive email into their tryout screen and it got almost every detail wrong except for the "format" fields.
jeroenhd|3 years ago
Onto the pihole blocklist it goes!
notahacker|3 years ago