According to @CryptoMichNL, OKX is running a Christmas promotion with approximately 15 days remaining that offers free BTC to users who join via the provided link (source: @CryptoMichNL on X, Dec 11, 2025). The post identifies OKX as the venue and Bitcoin (BTC) as the reward, without disclosing eligibility criteria, regional availability, KYC requirements, reward size, or distribution mechanics (source: @CryptoMichNL on X, Dec 11, 2025). The message presents a time-limited exchange incentive centered on BTC participation through OKX, with no additional terms specified in the post (source: @CryptoMichNL on X, Dec 11, 2025).