スタジオ = Studio, ジブリ = Ghibli. "株式会社" just means something like Inc or Ltd, so it looks official and stiff, not something for a fan community. As a native Japanese speaker I got the vibes as if this place is officially endorsed by the company or is a community to talk about the business side of the studio.
As a Japanese I can attest that at least one other country is stuck like that too, and likely many others