I don't see how not being in the Beta can make anyone feel disadvantaged or make them feel cheated or anything else. Some games have free Beta's under a strict NDA so some are in it, you can't tell anyone you are, and a lot aren't. At least FD makes there Beta NDA free, and anyone can watch video's as it progresses from those in it who post updates as they go. So in essence you may not get to test the content, you will see it, read about it, and will eventually play it and know what came and went along the way, compared to closed Beta's where if the rules of the NDA are followed you have no idea who is in the Beta, know nothing about it, what is in it or removed till announced and goes gold. So pay to play now or wait, you will get it when released with the added benefit as I said, you will know a lot about it from watching the video's others post, and that is all free.
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The last added benefit of waiting, you saw it, now when you experience it on a live server for the first time the 'thrill' excitement and the OH WOW this is what they were talking about will be with you, while those in Beta will not have much of anything to look forward to having seen most of it and played it already.
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Calebe