Broken certs:

  curl: (60) SSL: no alternative certificate subject name matches target host name 'assets.oldversion.s3.amazonaws.com'

That aside, an obvious problem with binary download sites like this is that you don't know if what you're getting is malicious. Hosting arbitrary binaries isn't cheap, so the economics of sites like this almost encourages shady behavior, not to mention the possibility of malicious users.

Edit: I realize my broken certs problem must be caused by an extension (probably HTTPS Everywhere) here. Anyway, probably don't want to download binaries over unencrypted channels in 2020...