Harmful activities, malicious software, and unsolicited messages that compromise security and user experience.
The same has been happening to me as well! I have also received about four over the course of the past weeks. It's strange because there is no "call to action" in it, like usual with scammers. No link to click, or number to call. Which makes me concerned about what they're trying to do. I am also completely unfamiliar with these portals.