PayPal has begun testing a new loyalty program called PayPal Select that seeks to promote use of the digital-payments network by offering more rewards for its most active members. The program launched by invitation only based on users’ history on PayPal and follows by about 18 months the cancellation PayPal’s previous loyalty program, PayPal Advantage. As PayPal looks to continue to build its volume of use on mobile devices off of eBay, driving repeat use and loyalty will be key. The challenges for the offer part will be the same as any other deal/offer program – namely the quality of the offers and inbox-offer fatigue. Like any big-screen concept that gets downscaled onto mobile, there is the challenge of how to hook people in the first couple of screens. CreditCall is not involved with PayPal Select. The payment platform is a division of San Jose, CA-based online auction giant eBay. It offers both a mobile app and an m-dot site for mobile payments.