[Doubtful.]

Short answer: There are strong red flags — I’d treat NDAEnext as suspicious and potentially a scam until you can verify otherwise.

What I found (most important bits)

Independent review sites explicitly call NDAEnext an advance-fee / withdrawal scam and warn users not to pay additional “fees” or taxes because withdrawals may be blocked.

Multiple Reddit threads and user posts warn people not to trust NDAEnext, reporting the usual scam behaviour (hard or impossible withdrawals, “exclusive” offers, etc.).