When there were custom forms everyone had to fill out, as I recall, one of the questions was whether you had samples or goods for sale (or something like that).

When there were custom forms everyone had to fill out, as I recall, one of the questions was whether you had samples or goods for sale (or something like that). Priorities have probably shifted but direct commercial activities probably remain a concern even in countries that generally have no issue with you attending a conference or meeting with customers.