Can they do that? The "Limitations on Diaspora, Inc." section of the contributor agreement says:
> Diaspora, Inc. will not distribute your Contribution to any third party under any license without also requiring that third party to also make your Contribution available to the public under the same license.
I'm not sure but it sounds like that might prevent them from closed-source dual-licensing arrangements. I suppose that doesn't preclude them from building their own proprietary extensions to the Diaspora software for their own hosted services, although the agreement also states:
> Diaspora, Inc. will distribute the Diaspora™ Software, as a whole, under version 3 or later of the AGPL.
If extensions are considered part of the software "as a whole" then they might not even be able to do that.
> Diaspora, Inc. will not distribute your Contribution to any third party under any license without also requiring that third party to also make your Contribution available to the public under the same license.
I'm not sure but it sounds like that might prevent them from closed-source dual-licensing arrangements. I suppose that doesn't preclude them from building their own proprietary extensions to the Diaspora software for their own hosted services, although the agreement also states:
> Diaspora, Inc. will distribute the Diaspora™ Software, as a whole, under version 3 or later of the AGPL.
If extensions are considered part of the software "as a whole" then they might not even be able to do that.
https://github.com/diaspora/diaspora/wiki/New-CLA--12-13-10