What helps determine if something is a bribe or a legitimate gift?

$$A bribe is a hypothetical incentive to purchase from a salesperson, while a gift is an actual incentive from the salesperson.

$$A bribe gives a reason for an individual to recommend that a salesperson be added to the approved vendor list, while a gift secures an undue advantage for the salesperson.

$$A bribe gives a reason for an individual person to buy from that salesperson instead of others, while a gift is a thank$-$you or a standard incentive for the individuals company.

$$A bribe is an incentive for the company to purchase from a particular salesperson, while a gift is given to celebrate the close of a sale.

$$A bribe is something a customer requests from a salesperson in order for the salesperson to make the sale, while a gift is given voluntarily form the salesperson to the customer.