Does Copyright Cell C Logo allows MTN and Vodacom to do Copy and Paste 2GB mobile broadband of Cell?

Why MTN and Vodacom fail to make their own unique promotions to their customers than Copy and Paste from Cell C



Cell C was the first company to launch this 2gb free every 12 months promotion .

Vodacom followed with Copy and Paste just charging the Color to Red and this night crazy night shift thing.

Now is MTN (Empty-N) is also doing Copy and Paste, which color did they put is it Yellow?