I'm no longer a merchant, but I had a little idea that I thought would be
a nice addition to merchants (and not really much of an uptune).
Merchants trade, invest, speculate, loan etc. A merchants money
constantly flows back and forth and they deal with a lot of cash.
Merchants are natural gamblers.
Perhaps merchants should have a "gambling" skill that would allow
them to gamble with less chance of being addicted. Or perhaps you
could say that they are addicticed, but don't suffer ill effects
because of their every day occupation.