During British rule, kings who were the patrons of temples and temple arts became powerless. As a result, devadasis were left without their traditional means of support and patronage. Colonial views on devadasis are hotly disputed by several groups and organizations in India and by western academics.
The Reason for the Prevalence of the Devadasi system.
Unfortunately , things did not turn out as expected.People felt that religious sanction exonerated them from legal offences and continue to practice it secretly.Small temples have become the preferred venues for this practice.In this day and age , the devadasi is not an accomplished courtesan but a prstitute with no means of looking after herself.Her life is one of abject poverty , sexual exploitation , constant degradation and ultimate abandonment.
Source: Article in "Women era"