Nothing on here is being released to others and is all encrypted. I would suggest when using gmail you can and a "+" and something after it and it will go to your account, but you'll be able to sort emails and see where they are coming from. So you would update your email to username+intermat@gmail.com and you can then setup filters for that email address.
The ads are still being tweaked as far as what is shown and not allowed.
Of course I see this ad on this topic