Question about W-8 BEN form

[gartar]

I have to fill form W-8.
My country does not have contract with US for double tax avoiding.

I make money from affiliate programs(US based).

I don't have business in US(and I don't live in US), my business is in my country.I only receive money from US companies.

So do I have to pay tax in US?
How do I have to fill that form?

Thank you in advance