Pat The Cow says thank you very much for subscribing to Nick's newsletter!
...she also asks you to check your email inbox for a confirmation email. Pat is very up on her GDPR requirements, and doesn't want you to miss out. She also suggests you check your spam inbox if you don't see the email.
Yes, she agrees with you that all this data protection stuff is bloody annoying, but it's part and parcel of 21st century life, and she has made her peace with it.