Yes. They HAVE changed the sign-up/log-in system but it's probably more easier now. Now you just log out and change the email slightly. YOU DON*T NEED TO HAVE that specific email. That doesn't matter since you don't have to confirm it. Like this: "EmailExample" And when you are signing up again, just add 1 at the end; "EmailExample1" and you are ready to go.

So;
1. Sign-up with random email and do your rerolls (Like "TestEmail")
2. Sing out. (You can delete the account also, doesn't matter)
3. Sing-up again with slightly different email (Like "TestEmail1")

4. Repeat.