I currently have about 30k members on my multisite setup. I had your plugin active when I imported my users from another platform.
Now I wanted to go and change the settings so members are not automatically assigned to some of the blogs that I had them assigned to.
The problem is when I change the dropdown of one blog form subscriber to nothing, click submit, the script runs, but times out with a white screen. I see the server getting hammered, load jumps up, but the process never finishes.
I have a 5 minute timeout on php set on my server and more than enough resources.
Is there a way you could modify this script so that it will do the change in 'chunks' so that it can complete?
My next project is converting a vbulletin site with 600,000+ members and millions of posts. I'd like to use your plugin on that project as well, but I can't see it possibly finishing before the server timeout pretty much no matter how high I put it.
*I am willing to provide access to the site if you need it for testing just in case you don't have an environment with that many users to test on.