The only advantage of an offshore structure for this Aff venture is to avoid internal taxes, such as tax added value and others, depending of the country in which you have residence.
Since you have the duty to report the company to your Tax Office, there’s no way to avoid income tax etc.
The corporation is not a problem, but the bank is very important.
Be sure that it is a reputable institution with USA or EU headquarters.
Tax heavens were an invention of the multinationals to profit with the “transference prices” in the impo/expo biz, and to protect assets.
For our business a personal account in USA/Europe is enough.