Something that is not clear in your information is how the licensing works. You have a 1 site and a 5 site license.
In my case, I have an MU setup so have multiple sites, however, I only want the events function to be available on my main site which means one site.
Does that mean a 1 site license then?
What if I wanted to offer this to all blog owners, then this could mean what, beyond 5 sites as a license or can the plugin be used in network mode and remain a 1 site license. After all, the entire community would be one single community.