I can add to this aswell. I've tried creating my account with ePayments.
Send them all the documents, but they kept rejecting my Proof of Address.
They kept asking me to send documents in original format. (which I always did)
I sent them PDFs, they said they dont accept this format, because it could have been edited.
Then I scanned a printed copy and sent them. They said they accept only PDF and must be in original format.
I've sent them 3 totally different documents: bank statement and two utility bills. They always said they don't accept that because it is not in original format.︀ But all these documents were in original format that I was given by the service︁ providers.
So yeah, I agree, they probably just hoard the info now to sell it︂ to 3rd parties. Because I've been accepted to many places with these kind of documents︃ and never ever had problems.