As a spin off to the Cambodia is Spambodia [1] forum topic, many expats in Vietnam are now adverse to giving their business cards to Vietnamese nationals at networking events, especially when their card says...Sales / marketing and Business development, which translated means I am going to add you to my unsolicited spam list with NO way for you to unsubscribe.
Name and shame time..
Spam is simply counter productive
Most people don't realize that in the global north, spam considered to be an extremely bad business practice.