Hi, Yury.
We do have network-level administration options built into the plugin if you have a Multisite-type license code.
However, activating/deactivating would be done as a plugin as is regularly done within the network admin. For example, if you want our plugin(s) active on all sub-sites, you could Network Activate it. If you want it on 11 of 12 sites, you would have to activate the plugins on all 11 sites and not the 12th.
Last but not least, we have Bundles and a pretty great Refund Policy so you can buy one or many of our add-ons and thoroughly test them.
I hope this info helps. Let me know if you have any follow-up questions.