due to popular demand; by popular demand
A set phrase used in commercial or promotional contexts to indicate that something is being offered or extended because it was well received.
Due to popular demand, we are extending the sale period.
By popular demand, a reprint has been decided.
Alternate spelling using the kanji 付き; slightly more formal or literary.
A fixed phrase composed of 好評 (favorable reception) + に + つき (conjunctive form of 付く, here meaning 'because of').