As you can read here: http://energycontrol.org/component/content/article/100-sobre-energy-control/584-2016-01-07-17-04-34.html
they will charge 30€ per analysis, unless you bring it personally to Madrid or BCN, also samples mailed from Cataluña (Spain) are still free of charge.
At least for people in USA it has not been free and I don't know if it ever was. I think I paid like 70 in btc for the test I ran.