You guys misunderstand how things work between developer and publisher. Aigis devs have no rights over their work. Its funded by DMM and all major decisions happen through DMM. DMM decided to give rights to their overseas partner Nutaku, then decided it wasn't bringing them enough cash and didn't prolong contract for year 2018. While there are some games on DMM which aren't owned by DMM (Granblue and Shadowverse), they are exceptions.

As for Nutaku being small and tight on funds. Is is joke? Nutaku and SuperHippo are subsidiaries of MindGeek, largest porn empire in the world. Nutaku is swimming in cash, at the point that they spent millions of dollars investing into random western porn devs. You can check "hiring" section of MindGeek, they are seeking to fill dozens of vacancies for Nutaku and SuperHippo, they keep growing and in no way are "small".