Then your PowPing account goes with it. Everything you do on the site is signed with your paymail signature. PowPing accounts are simply conduits for simplifying interactions on the site. When you first sign up to powping, your swiped paymail gets connected to the unique username. This means if you give it away and someone else starts using that paymail, they will get access to your PowPing acount. Think of it as signing in with Facebook connect. If you gave someone else the login credentials to your Facebook, that person will be able to sign in to all the "sign in with facebook" websites with that account.
Then your PowPing account goes with it. Everything you do on the site is signed with your paymail signature. PowPing accounts are simply conduits for simplifying interactions on the site. When you first sign up to powping, your swiped paymail gets connected to the unique username. This means if you give it away and someone else starts using that paymail, they will get access to your PowPing acount. Think of it as signing in with Facebook connect. If you gave someone else the login credentials to your Facebook, that person will be able to sign in to all the "sign in with facebook" websites with that account.