Kubera ko itabi rigabanuka bitewe n’ingamba zatewe n’ubuzima rusange, inganda z’itabi zashakishaga uburyo bushya bwo guhuza urubyiruko. Nubwo ibicuruzwa byitabi bitagira umwotsi bimaze imyaka ku isoko, pisine nucotine nshya "itagira umwotsi kandi idafite imitoma" itangiye kwamamara kubera kwamamaza imbuga nkoranyambaga. By'umwihariko, Zyn, yinjiye ku isoko muri 2014,