I know there may be many people who are not playing at duelbits actively. By announcing the giveaways only on Twitter means that they want more inactive or new people to join their site.
This is exactly the points of promotions which is to reach out for the mass potential customers that havent registered and try the site. There is really no reason to keep a customer staying by giving all those free stuff. In the online gambling business, as long as the site never delay payment and it gives decent amount of rakeback especially to those that wagers alot then people are staying
Duelbits started their advertising and giveaways in social media together with their signature campaign in this forum.
If i remember it correctly , they once have 20 cents or 40 cents giveaway for the first couple of account that will use the code they are giving in instagram things that I won several times and even make it to a hundred dollars more from that bonus.
and also i am one of those players that tried Dueling in this site.
so yeah it is indeed that Duelbits are giving away those amount from the beginning and thru their generosity , still now bringing those bonuses in all forms of social media specially twitter .