What LinkedIn recently changed to the groups:
- Groups are now accessible from the LinkedIn mobile application: note that this is something truly useful but I have not yet found how to do this. Since these changes are recent, it should be a matter of days.
- Unless I missed something, it is not possible to send a weekly email to the members of the group anymore.
- You are encouraged to invite people and again, publishing content related to new gTLDs (only) is open to anyone as long as you stick to the subject. I just block domainers who try to sell their domain names.
- When sharing content from other sites, it is recommended to add a question to the content you are sharing to invite discussion.
We now pay attention to publishing all content to the Google+ Community, which is another communication channel that we maintain on a daily basis.
The new gTLD group is free to access. You can join and contribute here.