BTC giveaways are allowed. Most are in games and rounds, along with the other spammy "post here for x" type posts. https://bitcointalk.org/index.php?board=71.0

And before anyone complains about unfairness, yes there is a huge difference between having a child board for giveaways of bitcoin, which this forum was created for and is dedicated to, and making a child board for giveaways of 600+ and counting coins.