Yeah, Some user is too busy getting the code quickly and input on their Duelbits account so I understand the lack of likes on their tweet. I preferred too a giveaway with requirements so that bot users can't participate and abused the code. Duelbits previous promotion is still subjected to criticism due to the controversial result that they release for the plinko event. They are still not releasing an official statement about the issue but the original already transfer the funds to the user that complained about the result.
I managed to redeem the 2$ cash drop after a few minutes it was announced. I doubt this kind of giveaway will last an hour considering its easily to claim so yeah duelbits should have an extra layer of security to counter multiple account user.
It is undeniable that Bots work in some duelbits code promotions that's why i suggest duelbits set terms in every code promotion for example min wager in a week/month
But if it is less than $0.5 no problem without conditions they can't do anything with $0.5
or maybe there is a special code for VIP users.Regarding the Plinko promotion I think it's just admin's negligence I don't see any other indication there because they spend a lot of money every month on promotion and advertising.
.The duelbits team are mostly active in giving away some coupon and other sort of events on twitter so if you are active there you can also participate in them and conditions are also simple like rt,like,tag friends in most of them and then see if you are lucky. 
