Arthur Burry Dance Studio ("ABDS") decides, to advance its market share in flamenco dancing nationally by hosting a contest, with the top prize of $10,000 plus a year of free dance lessons through ABDS.ABDS advertises the contest to all of its existing students nationally with a Twitter message that reads "Flamenco Dance Contest April 1. $10,000 to Best Dancer. Enter Contest here:http://bit.ly/arthur_burry/dance_contest/"

The tweet reaches 800,000 users, and results in approximately 500 entries from users.After auditions, ABDS narrows down the contestant list to 85 entrants, who subsequently appear on April 1 to compete.However, ABDS decides to cancel the contest on April 1 and refuses to pay the prize to anyone.

Is ABDS under any obligation to the contestants?