Originally Posted by sdsearch

Are you sure you can? The concept with "aditional" business cards is eimployee cards, not additional random users. Business cards are intended for businesses, and family members are usually not part of the business, and thus from the bank's perspective, there's no "need" for "authorized users" in the personal card sense.

Meanwhile, I don't know if they ever offer bonuses for adding employee cards.

There are a number of differences between personal cards and business cards, and you shouldn't assume that everything that happens with one happens with the other.