I assume you obfuscated the email address based on the reasoning that good hackers can figure it out. I'm wondering if that's wise: good hackers also may not want to play games when it comes to just opening a channel of communication.
A lot of people who apply mention that they enjoyed the small puzzle. It's not intended to take much time -- if it's not clear after a few minutes, feel free to just email jobs@siftscience.com.
