Original sentence: MESS is distributed under the same license as MAME (available at no cost, including its source code), That is, it is freeware
Edited sentence: MESS is distributed under the same license as MAME.That is, its license does not meet the conditions of the Open Source Definition, nor is it "free software" as defined by the Free Software Foundation.While MESS is available at no cost, including its source code, it is not open-source software or free software because commercial use and redistribution are prohibited