There is something that not everyone sees here, and that is that when there are many promotions in a casino, they tend to attract many players, but obviously when the conditions are normal and acceptable, or at least possible to carry out and comply with, but when they are conditions that are be very difficult at least I stay away, but in the case of Duelbits they do not have such extreme requirements, I think they are normal, and each casino team has its own marketing and promotion rules, they have done market research They have compared it with other casinos and then they can decide what is best for them.
They have normal requirements say about wagering 1x or more but in many giveaways on Twitter they don't have any such things also and you can easily try them to see if you are lucky in them or not.Most of the casinos don't put too much extreme conditions for promotional offers and duelbits is also among them.They look for market conditions and then come up with any offers for the players.
for those looking to hustle into promotion offers in twitter the best way is probably turning on alerts
I tried once or twice with duelbits promos there and it "sold out" just too fast, when I arrived all the coupons were already gone