I'm following Joel for some time and I really like his videos. He is heavily into 3d printing and his YouTube channel shows his passion. He is truly a 3D Printing Nerd.
Since he reached 10k subscribers he organized this cool giveaway with bunch of great prizes including Wanhao Duplicator I3.
All the instructions are in the video and you can go directly to Gleam giveaway link:
https://gleam.io/GBoGg/3d-printing-nerd-10k-giveaway
and don't forget to subscribe to his YouTube channel!!!