Increasing the capacity of the signature campaign to such extent is big and additionally the promotions rates are spiking up.
In fact, while writing this post I just cam across another promotion by them. It's good that Duelbits is focusing more on promotions.
It will definitely create a positive impact on their business.~
I'm not surprised at all. Duelbits has always been generous towards its users. I can remember multiple giveaways, competitions and stuff since I first saw them on bitcointalk. No wonder they are flourishing. Not only it's a well made site with a great reputation, they keep running amazing promos all the time.