While I understand that for the sake of transparency having the spreadsheet public is understandable, I also think there's room to debate here - would the overall users prefer to only those running in the campaign having access to the file? Or, if no one is looking at it, should it be kept private within the campaign manager (as a way to keep the records and facilitate payments)?
Genuine question: Why are people looking at the spreadsheet? What information are they taking from it? They have no need to know other users' addresses or post counts, and they can figure out how many of their own posts have been counted based on how much they are paid.
As I said, I haven't looked at the spreadsheet in years. I don't see why it needs to exist. I can maybe see an argument for a public spreadsheet in short lived campaigns, high turn over campaigns, or campaigns with a relatively new/inexperienced/untrusted manager, but not here.