Duelbits offers promotional bonuses from wagered $200 to $2000.
You can refer to Duelbits promotions. -- https://duelbits.com/welcome-free-spins/index.html?utm_campaign=coin

FortuneJack offers a first deposit bonus, up to being able to get 250 free spins.
Refer to promotional bonuses. -- https://fortunejack.com/promotions/welcome-offers

But I want to know, are you looking for a no deposit promotional bonus?