On their official website forums, it is indicated there are some licensing issues. I wouldn't be shocked if it's the end of the product line, as apparently there were quality issues and not a lot of product to support it.
Rebrand it, and it should do reasonably well. I'm really surprised it hasn't been retrocloned yet... It gets a significant amount of play on Roll20: 8.8% of Roll20 players played it in Q1 2018; right on par with Shadowrun 5 and Starfinder.Try to sell D&D 4th edition nowadays and let's see how well it'll perform.