As another foreigner, albeit closer to the USA than most, I also see some
limitations in the proposed 10% discount for members.
1) It isn't competitive. As others have said: given the exchange rates,
import duty, shipping costs; my local games store can probably still get me
the item at a better price than direct ordering it from the USA.
2) It is not healthy for Gloranthan sales. My local shop only stocks
Gloranthan material because they know they can get reliable sales of at
least a few units of any product. If I and the few other local fans become
members and start direct-ordering, then the shop may well decide not to
waste shelf space on Gloranthan material, and that means new people won't
see the material. Which is bad for recruitment and long-term sales.
It might cost Issaries more and be harder to administer, but maybe instead
of a direct-order discount, they could offer a retail rebate? For example: I
buy a product at my local shop, I send proof-of-purchase to Issaries, they
put some credit in my account at Wizard's Attic, I get to use that credit to
buy or at least subsidize the occassional product that my local merchant
doesn't have.