I have never visited these kino domains, but I assume that’s just some piracy entity. Yet it’s quite impressive how many various domain names they bought! What for? Is it to avoid those blocks? Or is there any more reasons?

mostly to avoid the blocking. Those streaming sites used to be extremely popular here in Germany because there was an entire cottage industry (Abmahnanwälte) that used to pester uploaders with legal threats.

Not sure what the state of it is now given that commercial streaming replaced a lot of both.