NAPLES, FL--(Marketwired - May 23, 2015) - topcreditcardprocessors.com, an independent research firm, has named the rankings of the 50 top credit card processing services for the month of May 2015. The rankings are released on a monthly basis to identify the top services based on their strengths and competitive advantages. Businesses looking for a remarkable payment processing service access the rankings online to find those which have been announced by an independent research firm.