It's a single entry tournament with no limit on participants, though as of this writing there were only 4,829 entrants. The top 91 lineups will receive tickets to cash contests. Total prizes are worth $500. Here's the breakdown:
- 1st - NFL $20 Millionaire Maker ticket
- 2nd-36th - $9 ticket
- 37th-91st - $3 ticket
The cool part is that this contest is "season long", meaning you'll be able to enter a new free roll every week, and someone (presumably from ESPN and/or DraftKings) will be keeping a season tally of scores. I haven't seen any grand prizes announced for the season-long points winner, but I have to imagine Matthew Berry and company have something in mind.
In any event, you'll never get more +EV than you will with a free roll. Enjoy, and good luck in Week 1.