With international affiliates, SS/EIN is not required, I assume they told you to put all 5′s in that field just so the site would accept that the field isn’t blank. International affiliates are generally required to fill out a W-8BEN form for tax purposes.
iRocketMedia - Your Earnings have no Limit, Not even the Sky can stop you at iRocket Media.
I just finished filling out & sending in my 1042S Forms. The EIN/SS number would be required under certain circumstances & if available should be filled out, but is not required. Unless you are from a country where there is no tax treaty, in which case, the company would be required to withhold 30% of the funds for tax purposes. Also there is no $600 minimum earnings needed for foreign publishers. If you earn any amount of money then the advertiser is required to send a 1042S.