From what I see most of the items pertain to one of two possibilities:
1 - General procedures or information about the company (keep this updated and it's the same for all requests)
2 - Information about the subject (export their data in an automated fashion)
The thing about 'decisions based on their data' might be tricky, but I guess you can share what you concluded from it and the overall rationale (for example, Facebook's "Why am I seeing this" over an ad)
Which items do you feel are an impossible burden?
From what I see most of the items pertain to one of two possibilities:
1 - General procedures or information about the company (keep this updated and it's the same for all requests)
2 - Information about the subject (export their data in an automated fashion)
The thing about 'decisions based on their data' might be tricky, but I guess you can share what you concluded from it and the overall rationale (for example, Facebook's "Why am I seeing this" over an ad)