It is not the buying and selling of wares as such that is judged here. It is the way in which Tyre conducted her business which caused her to be labelled a prostitute. Tyre’s purpose was to increase wealth at all costs, with no thought for the kingdom of God.
17 Au bout de soixante-dix ans, l'Eternel visitera Tyr, Et elle retournera à son salaire impur; Elle se prostituera à tous les royaumes de la terre, Sur la face du monde.