You know when you have a gmail account, you can send email to:
account1+1@gmail.com
account1+2@gmail.com
account1+whatever@gmail.com
and all the emails will go to account1@gmail.com. However, most websites will see this as a unique email, so you can use the trick as many times as you like. No need to go around creating multiple email accounts 
Sense Amid Madness, Wit Amidst Folly