Well, first GitHub, and now Google Code, both cease to host your binaries on their platforms. The reasons are the same — distributing binaries is not what they do. They manage source code, documentation, issues, etc., but not binaries, that’s a whole different business.
How do we know? Because it’s our business. As opposed to project development platforms, Bintray is a platform, that does one thing right — distributing your OSS binaries. And it’s free.