I need a website that facilitates a referral earning system. Key Requirements: - Implement a robust referral system (tiered rewards, cashback, or points-based) - User actions to be rewarded (e.g., signing up new users, making purchases, sharing on social media) - Design preferences (minimalistic, vibrant, or corporate) Ideal skills and experience: - Web development proficiency - Experience with referral systems - Strong design skills - UX/UI design expertise Please provide examples of similar work.