You're only required to distribute sources if you modify them _and_ distribute the resulting binaries right? Is there any evidence that the busybox and/or dnsm

You're only required to distribute sources if you modify them _and_ distribute the resulting binaries right? Is there any evidence that the busybox and/or dnsmasq binaries are anything besides the normal stock installation? The customization is in other binaries that need not necessarily be GPL it seems.