This is a great point and something we are actually about to implement shortly - starting with HiveBit, we'll build our list from all organic signups (of course I can scrape crypto users and cold email, but that's not as effective) - we'll also add a sign-up/CTA for a "newsletter" style email through the website, HiveHustlers.io.
Definitely a great suggestion though, and something we need to implement ASAP!