Problems and a change of leadership and other negative events in NEM negatively affected its price and popularity. Perhaps this service will help NEM become popular again and begin to grow. It's great that the Japanese NEM community is so active and developing the project.
This is one of the oldest project in blockchain with communities in every country we know, there are just not much projects developed under them. Its probably not a very friendly platform for developers. I've read a thread here telling the team was in the brink of bankrupt but that might not be true. They will eventually regain if the the lose money during the last bullrun.