Unfortunately we are getting more cheaters. Starting now, the reward is further reduced to $0.35.
That more or less ends this giveaway. Isn't there any other way to ensure accounts are real?
I've suggested it before (and I'm not sure if you've seen it): how about an airdrop to existing Bitcointalk user accounts? You risk airdropping on account farmers, but if it's related to Merit received and account Rank, you can exclude many spammers.
It would be sufficient to take into consideration only accounts with some rank and at least one acquired merit to exclude most account farmers. If too many acquired merits will be required, you'd end up doing an airdrop for just a few, which wouldn't make much sense. However, I'm not sure this all would change adoption rate so much. After all, people on BCT who are owning BTCs would have probably already applied to the airdrop one year ago.