That's what I mean by "a small and not famous studio".

Well if you're referring to big and popular as in the super niche night time anime then sure it doesn't have many popular anime. Now if you're referring to how many people watch, yaknow actual popularity? Then yes it's a big time studio. Bigger than most that dedicate themselves solely to late night. They probably have more actual employees as well.

They are targeted towards a different public.

No they are targeted to the public.

Don't change things up friend, you said they don't have popular shows. But it's undeniable they have the 2 of the most popular shows ever. Now if you meant that they aren't popular amongst the otaku or the weeb community then that's a different discussion in itself.