Competitor fairs struggled because merchants cheated them and returned home. [causal]
Other, smaller fairs that tried to compete with the Champagne Fairs on an equal footing would have to contend with merchants who participated only long enough to make a profitable cheating transaction and then return to the Champagne Fairs where their participation rights were intact.
PAUL R. MILGRO, PAUL R. MILGRO - THE ROLE O…, loc. 171