If the plugin is network-activated on a multisite installation, will each site on the network get its own instance of the plugin (which the site admin would configure with its own social networks)?
Yes. From our plugin’s perspective, sites in the network are independent from each other. This means, for example, that you’ll need a license key for each site (if you plan on using the premium version).
And is Nelio Content compatible with the Broadcast plugin, which ‘pushes’ published post content from 1 principal site to sites on the network?
Partially. Our plugin can automatically reshare old content without your doing anything. However, if you want to share a post when it’s published (and in the next hours and days after its publication), you have to schedule the specific messages that will be shared (it’s as easy as clicking on a button, if you want to, but you still have to do it).
You can download the plugin and give it a try. The free version will give you a clear idea of what it’s capable of.