You need to add a little line of explanation. I discovered that strange "Download from S3" link in my downloads today and wondered what it was. An alternate download link? Additional files (like, bonus files, since not all product had those links)?

That's why I came here and found this thread, to understand what is happening...

 

IMHO just rewording the "Download from S3" to "Alternate download server S3" would clarify things for everyone, explaining what this new thing is and which link to use.