This means, that they are free to play with options for upgrades, that are paid. Recently I made a few videos and review on this topic.
https://mmomakemoneyonline.net/threads/onli...-mardin.503084/
http://vortex.mx.free.fr/forum/viewtopic.p...826e5b51cfacc58
https://debate.socialism.nl/forum/showthread.php?tid=160666
https://talk.hyipinvest.net/threads/311032/#post-655352
http://www.horsecity.ru/phpBB3/viewtopic.p...22&t=218573
https://mmomakemoneyonline.net/threads/is-h...or-geld.523545/
https://www.chargersixpackforum.com/forum/t...onuskode.16515/
https://talkingpoints.org/subx/showthread.php?tid=20906
http://www.prepody.ru/topic97866.html
http://forum.bandingklub.cz/viewtopic.php?f=19&t=1467545