This topic has been discussed countless times. One of the discussions is here
https://bitcointalk.org/index.php?topic=5082394.msg48559477#msg48559477What you have to note is after the auditing officially. You still have one more chance to re-audit "illegally'' using the trick you have mentioned above.
After that "illegal" re-audit, you won't be able to re-audit again using the trick because twitteraudit will record the twitter user id and not the username.
So changing the username won't work.
Here is how a twitter user id looks like.
Even if you change your username, your user id never changes.
That's why some people complain that it doesn't work for them, it's because they have used the trick before.
Solution?Just buy the monthly package, re-audit yourself and also help out anyone here who would need to audit his/her profile, Next week or month probably someone else will also buy and help you or other people and the chain continues.