Bounty managers please kindly start hiding emails in your spreadsheet because I always like using new email for bounty participation and I surprised that there are many offer mails in my email account, some are free airdrop some are affiliate marketing offers, I still remember that some people are selling email addresses online, it will be easier for such people to go through bounty spreadsheet and pack the whole email address
Even if bounty managers hide the emails it doesn't mean that the BM can't use the emails to his or her own advantages, they can use it to spam or for advertisement, some will even sell to those buying thousands of email address on the web, it's better to use separate email for bounties, that's the best advice