I ran this past a few other devs first and there was general agreement that FusionCharts was mocking open source. They're using the same language used in the late 90s/early 00s to dismiss open source.
Edit: removed unnecessary political reference.
Edit: removed unnecessary political reference.
Fusion Charts is attacking libraries like this:
http://raphaeljs.com/ https://www.reverserisk.com/ico/ http://www.flotcharts.org/ http://www.jqplot.com/
I've not tried these libraries in a while, but certainly a few years ago they were buggy and hard to use. In other words that marketing line makes a whole lot of sense if you were an actual javascript developer trying to make charts.
Maybe things are different now, but I'd still use highcharts for a commercial website.
These libraries are great to start with, and works well for many use-cases. Just that when your needs expand (think of additional chart types for specific use-cases, cross-browser compatibility including IE6/7/8, direct support from developers, assurance of continued development and fixes, meaningful implementations for different business scenarios etc.), our customers believe in us!