I understand the need to spread the word, etc... and you are giving out free stuff.. but forcing people to follow and retweet your message, without even giving the option to edit the text.. I don't like it.
http://contests.about.com/od/c/g/consideration.htm
Any sweepstakes that requires consideration from an entrant is illegal.
http://www.business.ftc.gov/documents/bus71-ftcs-revised-end...
It's a pack for hackers, after all. It's not a bug, it's a secret test of character!