Some feel that historically, the "one-time-purchase" model does not give sellers incentive to maintain relationships with their customers (after all, why should they care once they've received their money?).
Kai kurie mano, kad istoriškai "vienkartinio pirkimo" modelis nesuteikia pardavėjams paskatų palaikyti ryšius su savo klientais (galų gale, kodėl jie turėtų rūpintis, kai jie jau gavo savo pinigus?).