[bizguy]

I think blogging is great - for bloggers.

If the addon updates the blogging services, then it will help with traffic. If traffic is an interest, then from a site point of view, adding it will provide those that want to use it, the opportunity. Finally, if site searches include the blogs, then information that may be posted there, could become another resource.
As you have had some positive responses, I guess you need to consider cost vs the benefits.

I do not take the time to write blogs, but occasionally read them.

Why not try a Joomla blog like MojoBLOG - for free - and see what the actual usage is.