always dubious about emails out of the blue:
"This feature is available for $20"

ALWAYS check the website info:
"Quiet Coast started back in 2016 with a simple idea: write about music the way we actually talk about it with our friends."

against a whois lookup for the domain name (https://lookup.icann.org/en/lookup is a good place to use)
Name: QUIETCOASTMUSIC.COM
Dates
Created: 2026-02-15 05:50:37 UTC

domain name didn't exist before February 2026....

#redflag