Get 50 Mins Talk Time From #200 On MTN+20mb Extra Free Data

This offer works on MTN BetaTalk. Recharge with #200. You will get #500 on your bonus account. Bonus is valid for 7days. Next, dial *142# to activate your MTN XtraValue Mini. Your #200 main balance gives you #700 on your XtraValue mini account.
Add that to your BetaTalk bonus account, you have #1200 worth of airtime. Calls are charged 40k per second, which gives #24 per minute. If you divid #1200 by #24 per minute, you get 50 minutes. (You also get 20mb extra-*jara*). To see the economy of this simple procures, compare making calls at 11k per second with #5 daily charged.
Deduct #5 from #200 for 7days. Divid the balance by #6.6 (cost per minute call on the tariff).
I challenge you to show me a more economy way to use #200 worth of airtime on ANY NETWORK in Nigeria.
Your Comments Are welcome.