https://blog.stox.com/kuende-sponsored-us-open-event-starts-today-with-100-000-usd-in-prizes-be1a6f5eee4e

No it was limited time offer you can read details about this promo in that article. You miss the chance to win this token for free but that is very active platform so become part of this I hope they will offer more interesting promos in future.