Coinapult is running a holiday contest. Partial details pasted below, but you can get all the full info on their blog post here:
https://medium.com/@Coinapult/chance-to ... 0ac9b51d96
If you lock/unlock more than 15.00 USD/EUR/GBP in total volume before 11:59 PM EST on Sunday, December 20th, you will be automatically entered into the 2015 Coinapult Holiday Giveaway for the chance to win a $500 Grand Prize or $7000 in other bitcoin prizes!!! No email or other information needed!
$5 of BTC| 200 winners
$10 of BTC| 100 winners
$50 of BTC| 50 winners
$100 of BTC| 25 winners
$500 of BTC| 1 winner