ClapChat sounds really cool and I can definitely see myself using it. To give my two cents here, I just made an HN account yesterday and my interpretation of HN

ClapChat sounds really cool and I can definitely see myself using it. To give my two cents here, I just made an HN account yesterday and my interpretation of HN's policy regarding emails is not that by entering an email you are agreeing to the possibility of being contacted by other users. I don't have an email in my profile now and the banner at the top of my profile page says "Please put a valid address in the email field, or we won't be able to send you a new password if you forget yours. Your address is only visible to you and us. Crawlers and other users can't see it." To me, that means that by entering an email address I'd only ever be contacted for password resets.