Preferred digital payment methods in Turkey 2015

According to the source, "There are some regulatory requirements within the Turkish market that may present challenges to some merchants. These include:
1. Installments on credit card payments are popular, but can only be offered by connecting to individual banks.
2. Cross-border acquiring can lead to shopper surcharges and installments are only possible if connected to a domestic acquirer. (Note: Adyen is connected to most banks and can therefore offer installments for most Turkish customers.)
3. 3D Secure is mandatory on debit cards and recurring payments are not supported for debit cards."