How old the Neobux is?

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I was just wondering about this , since I got many positive responses about this site, and everybody say's that it's legit site and it pays. I recently rented referrals from this site, and gonna upgrade soon. So myLotters, anyone knows about Neobux that since how long this site is being operated? And since how long are you being member there? And how much time got paid by them? Is it beneficial to upgrade there?