wondering why there is a need for new team members? does it mean that those previous are not functional anymore?
It's pretty obvious, isn't it? The previous team members either voluntarily left themselves or were removed for various reasons which is why they are trying to hire new members as quickly as possible.
Their reputation took a big hit recently which is why they need to do a lot of right moves in order to appease their customers.
Whether previous team members were removed or they voluntarily left it's no new thing, in any organization when a team isn't giving sufficient performance or bringing in the results expected of them by the management, laying them off to bring in new hands becomes necessary. Freebitcoin have their personal reasons for a new team and it's likely part of efforts to meeting every users complains and getting things to work optimally with their platform.