Has anybody heard of Glipho?

Perhaps are more appropriate and useful question is: Does anybody have first-hand experience with Glipho?

At Google+, I received an invitation to join glipho.com. I had never heard of it so I googled it, went to the website, and went to Wikipedia (although they have no articles about it) to learn more of it.

From Google, the reviews seem to be favourable, but its own website makes it seem to be yet another community of bloggers (like IndiBlogger and Expat-Blog, both of which I am already a member).

However, it does seem that the moderators/owners of Glipho are more proactive in promoting the blogs at social media sites. Currently, I am providing links of my posts at Google+, but Glipho's approach seems to be greater.

Am I correct, and if so then is it worthwhile to join another blogging community?