I think you are misunderstanding jeena. If ejabberd were AGPL, then a fork/a instance of it like Whatsapp would be legally obliged to open up their code as well.
No idea whether the assumption is true that Whatsapp is just a branded deployment.
No idea whether the assumption is true that Whatsapp is just a branded deployment.
As the countless messaging apps out there demonstrate, the value of communication apps lies in the network they build. If they provide a decent UX, and successfully bootstrap a network large enough, it wont matter if their code is open.