Most people here surely know
"BountyDetective" because he manages a lot of campaigns, when we register he will definitely be asked to fill in an Email: (in form)
"Email addresses will be hidden, and won't be used for any spam / promotional actions. Emails are to verify users when comparing data with projects own data."But in fact they publish our emails in spreadsheet, is this what is called professional

We know that email is privacy and not for publication.
How do you think?
This concern should be directed to BountyDetective itself, so you could get their own views too and for amendment to be made, because it not proper. Letting them know the dangers attached to it will be of utmost importance.
If they are not told, the mistake will continue to repeat itself until participants who expose their sensitive emails begin to fall victim.
So, OP, or anyone can pas it across to the for correction.