I said this on the last repost as well.

Obviously there are reasons the film studios want that but actually getting information because you suspect someone crimes a bit too hard online is really tough. Your evidence must be waterproof to get a subpoena and until then you can run into a plathera of different issues thanks to airtight GDPR rules that still apply to US companies as well (they updated them to be even more strict with their newer compliance laws last year).

Actually there's a good chance that sharing data or IPs without a subpoena could be not only devastating to any potential legal case, but also to Reddit. They will never do this because they stand to gain nothing from it as is and if they wanna go IPO they can't pull such shakes moves rn.

Obligatory IANAL, if you need legal advice, ask a lawyer because they need all your context and they will know the ins and outs of their field.