I agree that one dollar spreads are difficult to profit from. I think the author is used one dollar for simplicity, but I agree the credits look to small to take the risk.

I agree with the 80%, I was unsure why 79% was used. I assumed the author was just making a point by massaging the numbers a bit or just bring imprecise, not sure the exact motivation...

I am impressed that you have written three books.
Many of us on Steemit have the desire to do that, but you have done it. Congratulations.

I am glad you discovered Steemleo and I look forward to reading your posts.

✍️