@element AGPL: Great. CLA: Required to be able to relicense for specific customers, understandable. But allows you to "go closed source".
Not sure if it is possible to codify in legal terms that Element is indefinitely required to distribute a version of the software under the AGPL, maybe the one hosted at matrix.org? That would nerf the CLA by preventing you to fully go closed and in turn preserve trust in the community.