@diazona @jbowen They do have a CLA but it doesn't seems to be in the repository (git grep intellectual returns nothing), see https://cla-assistant.io/element-hq/dendrite
Also on the relicensing, I would wonder if all the ones at https://github.com/matrix-org/dendrite/graphs/contributors did agree to Apache-2.0 being changed to AGPLv3+proprietary since you can't just strip out copyright notices and permissions without at least some kind of agreement.