ApplePay will show substantial growth in acceptance as an alternative pay method over the next three years. However, PayPal, now more widely used, will maintain its lead in this arena, according to Boston Retail Partners' 15th Annual POS/Customer Engagement Benchmarking Survey. The results were released during the National Retail Federation's annual Big Show this week. PayPal was used by 13 percent of respondents with 18 percent planning to add it within one year and 31 percent within one to three years.