The approving crypto ads include 2 parts: Ad review: Facebook's ad approval system will determine if the content or the ad itsetlf violates any policies. Ad account review: If the ad is determined to violate any policies, Facebook will check the linked account is approved to advertise crypto products and services. In case your ad violates Facebook's policies, it will fall under the policy and the associated ad account has not been approved to advertise virtual currency. Besides, you need to pay attention that your advertising must not promote prohibited financial products.