A wise man listens to an opinion and tries to develop his own but a foolish man listens to an opinion and except it as fact.
If you hear the words free and/or unlimited. Run and never look back as these are tricks.
Life remains constant. The more somethings remain the same, the more they must change.
Public Domain and Open Source are the only free you should trust. Public Domain doesn't have or lack copy right and Open Source means the source code is open for all.