We do a giveaway once a year to mark the end of a fishing season and we run with the treasure hunt theme. No subscription required. We hide clues in videos throughout the season and then at the end we give them one clue that will lead them down the path to a $100 gift card or something like that. Because of the nature of the contest the viewers need to re-watch videos in a playlist, so analytics look awesome that month. Its a lot of fun.