Yep, paying customers are licensed by the node rather than by the gigabyte (as Splunk does it), and you're really only limited by your hardware at that point. You might be surprised at how much you can accomplish on the free license, though--there are several small businesses using it to monitor their networks because 2GB/day will hold a pretty hefty amount of Netflow, collectd, Zeek, and syslog records.
