Why Nayan is against endorsements?

In an age when the number of endorsements reflects the popularity of the star, it is surprising to find a heroine saying no to it. According to sources, Nayanatara has refused to do an advertisement when approached by a company to endorse their product, stating that she is not interested to be seen daily on the small screen. Don't know what prompted her to say so. Maybe she does not like to scoot her way to success, the way a very popular and ad-savvy Telugu actress does.