Hey, I've used this and gotten a couple beta keys already and since my friends are in the beta with me i don't care about other people using this.
Things you need:
Common sense on how to clear your browser cookies
time
things that help:
notepad file with all the emails
know how to copy and paste easily
OK first you make a nice text file of emails with the @mailinator.com address on em
now go to Blizzard Store and make accounts with said emails
now when you're done go to mailinator.com and go to that respective email account(type in the first part in the email address ie. the random1 in [email protected]
and activate all the accounts. since mailinator.com is a "spam email dump" website the email address is created as soon as somebody goes to it or email gets sent to it.
Me working with a couple friends made hundreds and maybe thousands of blizzard store accounts using this method.
Have fun in the beta!