Yes. XMPP, the protocol, is just an open standard. If theyve implemented their own version, they can ise any license they want.
If they forked an implementation, on the other hand, there are some limitations depending on the license. But even if the server was forked from GPL code, they dont need to publish the server code.
Can they do that and not publish the source code?
Yes. XMPP, the protocol, is just an open standard. If theyve implemented their own version, they can ise any license they want.
If they forked an implementation, on the other hand, there are some limitations depending on the license. But even if the server was forked from GPL code, they dont need to publish the server code.