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
When I was active int he altcoin bounty hunting I seldom encounter bounty campaign that I ask for emails but there are a lot of airdrops that asked for emails if I encounter one I just use a spare email where I created specifically for my traffic lists and airdrop offer, most of these offers just landed in the spam emails.