I am reading a book. It says there is a bakery owner who wants everyone will be hungry for one thing - his donuts! So he invented a special donut recipe. As result, his donuts are turning people into zombies after they had his donuts.
As long as I am selling lots of donuts, who cares?
As long as I can sell lots of donuts, who cares?
I wonder why the author write the sentence in present progressive instead of present simple. What's difference between the two sentences?