For mass distribution, sure a solution like S3 is the way to go. However, this was more of a "The file is too large to email, I'll zip the build and send a shared link" occasion. Using S3 for that is a sledgehammer approach especially when you're working with people who aren't tech savvy.

The concern is that G-Drive (not Docs) seems to arbitrarily decide what you can and can't share using it. In this case, it was a binary and associated files. I was able to share an earlier build without problems. Was it a DLL I'd bundled? VCpp redistributable? Was there some pattern of bits in the code that bothered the file checker? I don't know what triggered the violation and probably never will.