How to calculate is it possible to have any penny with contextual advertising? For example ojooo.com. Proposes the following system to achieve the bonus. Buy a premium account plus 200 Ref. Spend 79$ After for 12 days every 3 days do increase the number of referrals. In the end, introduced into the system 111 USD. Output promise 2000 Ref. In the end$ 40 a day. How do you what's the catch?