If you were going to violate their license you just wouldn't pay for it at all. It's free for academic and noncommercial use and you can download the complete l

If you were going to violate their license you just wouldn't pay for it at all. It's free for academic and noncommercial use and you can download the complete library right from their site. Corporate environments tend to have tools to manage seat-based licensing and smaller companies only have a handful of developers anyway. Typically the number of developers who need to be working with a specific tool is known when you start the project you're buying a license for and upgrading your license isn't exactly tough. I convinced my boss to buy our department a 5 seat license for Highcharts (without support) after doing a pretty exhaustive search for free alternatives with all the features we need and it has been great so far.