Yup - federated communities grow specially well in a corporate landscape. However my concern is if they're able to stay dominant enough to prevent a cycle like:
Corporate landscape.
You got a few federated alternatives growing.
Federations grow enough to become the main landscape.
Corporations do something [I do not know what] better than federations.
Corporates grow to the point of dwarfing the federations, into a corporate landscape.
For example, it's possible for me that corporations are specially able to exploit a federated landscape through EEE. I'm just conjecturing though.