It cannot be cost free 100%, because I just spent $60 for a file planet membership to download the BETA.client I cant use, because you need a key to unlock it.
You're mixing something up there.
MechWarrior: Living Legends (MWLL) is a mod for the upcoming game Crysis:
http://www.ea.com/crysis/Crysis is a full-price game developed by a professional development studio (Crytek) and distributed by the world's largest game publisher (Electronic Arts).
MWLL is developed and promoted by a group of volunteers in their spare time (mostly) and distributed with the help and support of a few generous companies like MyInternetServices.com which will hopefully provide game servers and download mirrors once the game has reached a playable state.
To play MechWarrior: Living Legends you will need the game Crysis - which will be released on November 16 - and quite some patience, because there will not be a playable version of MechWarrior: Living Legends anytime soon.
Fileplanet had a promotion running earlier (several weeks ago) during which you could get access to the Crysis Beta client. That, however, has absolutely nothing to do with MWLL.