If your binary files are not huge you can always add them directly to your repo (they don't have a repo file size limit anymore). If we're talking about multiple GB just go for S3, we're talking about cents per month.
Yeah, I'll likely end up using S3. Or maybe even bitbucket.
But there's a very real and somewhat irrational negative emotional response when going from free to not-free. Or alternatively, from included in private costs to a paid for feature taken away.