Isn't this quite useless, when they don't have the copyright on the initial version, since they didn't require a CLA back then?

CLA allows them to relicense your contributions under their own license - e.g. proprietary

A DCO would be the more friendly option.

	▲	ahepp 30 minutes ago \| parent [-]
		I think the question is, what use is adding a CLA if the core was under (A)GPL? Unless you go back and get all the OG contributors to sign over their rights, how can you relicense?