Hi,
I have worked for 1 year as Marketing Analyst and have more than 5 years of experience working as social media marketer including platforms like Facebook, Twitter, Youtube, Google Plus, Linkedin, Pinterest, Tumblr, About me, Instagram and many more.
Our Strategy:
The participants sometimes get fake likes to win the contests. I have the experience of running giveaways and contests. I can easily identify a fake profile and remove it to pick a legitimate winner.
Contest can be done through app page in facebook or directly on facebook.
Don't hesitate to contact me if you want to know more or clarify anything.