Note: These heuristics, along with Skynet itself, currently are dependant on ProtocolLib, but this is subject to change.
All premium heuristics are updated continuously, which will be entirely free as long as your license is valid. To update them without restarting your server, simply run the command /skynet reload.
You simply pay for a license key, which can be entered in Skynet's configuration. The heuristics will be first loaded during server restart.