Based on your financial expertise, provide your response or viewpoint on the given financial question or topic. The response format is open.

Figuring out if I receive US income?
I believe the answer is no, since your income from royalties and app sales would fall under FDAP income. (another conformation of this would be the fact that Apple and Google requested a W8-BEN form from you and not a W8-ECI form) Generally, All income EXCEPT FDAP income (fixed or determinable annual or periodical income) are ECI income.  FDAP income includes income from interest, rent, dividends etc. IRS link to a list of all Income classified under FDAP below:- https://www.irs.gov/individuals/international-taxpayers/fixed-determinable-annual-periodical-fdap-income https://www.irs.gov/pub/irs-pdf/iw8eci.pdf (page 3 - under effectively connected income)