[frittata]

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.

[jeroenhd]

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.

Onto the pihole blocklist it goes!

[notahacker]

Getting their URL put onto spam blocklists sounds like an unusually counterproductive way for a 'block spam' service to market...