what forms does a foreigner, under a foreign limited company, file for US based affiliate programs (Mavely)?

[Rojees82]

Hi there!

I am a foreigner, living in Hong Kong with a Hong Kong limited company.  I don't have any presence in the US.

I am now looking to use Mavely, US affiliate marketing program, by posting links on my blogs and earning through that.  To my understanding, since I don't have a US presence and not connected with a U.S. trade or business, therefore I am not subject to U.S. income tax, assuming all work is performed outside the U.S (which applies to my case). 

Is this accurate? and would the only form to complete  be Form W-8BEN? Am i missing something?

Thanks so much!