I know what you mean by rewarding some Bitcoins. But give the person what they really want. Not that I'm forbidding you to give away bitcoins, but that kind of adoption still isn't quite right.
Actually I think it is right to gift btc to family and loved ones if we want to increase the awareness and acceptance, little steps can make a big difference.
Maybe next time to give bitcoins, I don't think it's the birthday person's wish but the ambition of you who just fell in love with bitcoin. That's fine, but you also need to be able to tell the difference between adoption and not.
What if they actually sold it for money? is it effective as adoption?
How would you know they won't like it if you don't give it in the first place? You can't know what people's reaction will be towards something new unless you give them access to either like or don't like.
Even if they didn't hold and sell for fiat there is no big deal, the important thing is the awareness.