Yep, same issues here too, and Squarespace livechat have just suggested I make my hundreds of zip files into PDFs, or put google drive links inside PDFs. When sites like itch.io make downloading so smooth, I really don't want my site to look incredibly unprofessional by having these janky links and PDFs and such. Support for digital products has always been kind of a joke but this is the first time I'm genuinely starting to look elsewhere for this kind of service provider.