Ubuntu does source-only uploads. Binaries cannot be uploaded by anyone; everything is built on Launchpad's infrastructure (managed by Canonical). Debian tradit

Ubuntu does source-only uploads. Binaries cannot be uploaded by anyone; everything is built on Launchpad's infrastructure (managed by Canonical). Debian traditionally has done source-and-binary uploads for the maintainer's architecture (usually amd64), and builds for other architectures via the its buildd infrastructure (managed by contributors, AIUI). More recently it is possible to do source-only uploads to Debian now, but I'm told it doesn't work for new packages.