MAIET Entertainment was the original developers of RaiderZ, later published by Perfect World Entertainment. Earlier this year, Masangsoft wrote that it was working to take over the IP from MAIET. Apparently, this has now happened with the company posting to the RaiderZ Facebook page that the team has started looking over the game to see what can be done to "reinvent this game".
Here is the post in full:
So, apparently when one MMO dies (ASTA), another one rises again to take its place.
You can check out the link above for more information.
See this forum thread as well.