cultural example is the fact that Islam prohibits the charging of interest.
When dealing with contracts in the Middle East, interest is still charged, but
it isn't called "interest". Other names are used to apply, and the
ways in which they apply are specialized and vary depending on the subject
matter of the transaction.
Yes, cultural differences should affect how a business practices. If you are
not culturally sensitive, you can end up with a much smaller market than you
would otherwise have. Not every business should bend to every culture, but
cultural sensitivity can provide many opportunities that would otherwise be
unavailable. Of course, some businesses don't wish to have a larger market share,
and if they don't, then this is one way to keep their market limited.