Thank you for your reply and situation details.
Because every time when a new subsite is created I shoud go to the plugin settings and tick this new subsite.
You're right... This is a little difficult problem. And, I think to your ideas is great!
But I will need consider if beginning deactive or if beginning active for Subsites.
- Default is show announce on the subsite when subsite is created.
- Default is hide announce on the subsite when subsite is created.
I'll try think to better ideas.
If you have any ideas, if you don't mind please tell me your ideas.