If the owner of the file has enabled the feature where other affiliate accounts can not download the file it has absolutely nothing to do with premium sales.i not using vpn when downloaded, if you don’t know not to spam!
I think filejoker did at the request of a partner, the owner of that site, and this is very stupid, people will never buy premium in the future.
If a downloader wants to download the file, free or premium, it is not a problem at all.
If another partner/affiliate/webmaster, call it what you will, try to download the file it will fail.
Its a protection of the affiliates files so its not so easy for other affiliates to download the file and maybe even "re-post" the content.