Yes, we had some problems with the winner. I think he was just trying to win another 0.009 BTC, so the whole thing left a bit of an bitter aftertaste. We gained a lot of followers though an hopefully some new app users.
I don't understand how someone could claim the reward with his username? Unless his account was compromised, which is out of our reach. We don't want to complicate things with signed messages and so on as we are planning to do lots of giveaways. One thing we might do is, at the drawing process, we will exclude account which are only retweeting and liking giveaways and not producing any other real content.
We also found out that on Facebook it is very hard to do a viral giveaway as most people don't want to tell other people about it, so they maximize the chance they win themselves. And you are not allowed to make it mandatory to share the post in order to enter the contest (FB rules). It still seems people are sharing, but on Twitter it was way faster. Any tip?
Everyone welcome to our FB giveaway, which is also $50 worth of BTC (ends on Thursday):
https://facebook.com/TheCryptoApp