I have a decent size network with over 10k members. However I think the many of them are not active. Any ideas on how I can delete them or clean up the membership count to somewhat active members? Any ideas would be great. Maybe they could reapply?
I have seen some other ning creators want to delete inactive members as well. In my opinion, having inactive members doesn't hurt much. A larger membership (even if most is inactive) can help get new members to join and attract sponsors (if you sell ad space).
Some people that appear to be "inactive" might still be visiting the site and reading the content or reading the emails. They may be sharing blog posts, pictures, etc. all without logging in much at all. Others might be busy for a certain period of time (new job, working on dissertation, just moved, working extra hours, new child, illness, divorce, etc.) and can't participate for months at a time, but may again in the future when their schedule or situation improves.
Each ning creator has to do what they think is best for their own network. But, I just wanted to point these other possibilities. I am a member of at least 10 different ning sites (in addition to my own) and most of them I do not log-in often. But, I do visit most of them on a regular basis to read new content and sometimes I share some of the good content on social networks such as facebook, g+ and pinterest.
I think Michael is right on it.
What you should be thinking about is how to get those members back online. I mean, I sat there on your site and I still can't figure out what Wimax is. Obviously a specialized niche like that would know, and every single one of them invaluable for it!
So I think your concept must be off a bit. Maybe it is your marketing. Do you do periodic broadcast messages?