Seconded, @falktx, but what @mhoye talks about also apply to upstream tarballs or even version controlled source. Github’s been pushing pretty hard for its in-house clients and it’s not far fetched that restrictions will be imposed one day.

Plus, git archive is not sufficient if one’s project use sophisticated build tools, e.g. autoreconf hardly works for older recipes and the Makefile is usually expected to be pregenerated.