I read the attached article and it looks to me KFC is a little bit over their head with BTC and maybe they should have thought it out a little better.
Last part of the article:
"KFC’s payment processor is Bitpay, which last month was forced to temporarily raise its minimum invoice amount to $100 due to “current bitcoin network conditions”.So price of the bucket is 20$ and minimum amount you can spend is 100$. Maybe I am wrong and they did it on purpose
That being said, I am happy to see they are making an effort to include BTC as payment possibility and hope that it will progress to state where you can just choose BTC as payment method regardless of what your order and amount is.