As of today the limited time offer is valid only when you purchase a lifetime license of MultiCharts. Email firstname.lastname@example.org to activate the offer after purchase.
As of March 5th, 2013, the offer is as follows:
Free FX data for 1 year with purchase of a LIFETIME license of MultiCharts. Data comes from our FX servers and has tick, minute and daily bar history for 11 years (ask and bid values), and covers 30+ major pairs. Limited time offer. You can see more information about the data feed.