Another indication that Research In Motion's BlackBerry 10 platform will focus mainly on touch screens: Developers have not yet received prototypes with a physical keyboard after receiving touch-screen models several months back, they say. "You can’t build a smartphone without a touch screen anymore. But you can’t expect your loyal user base to stick with you if you take away why they’ve stuck with you," said Roger Entner, an analyst at Recon Analytics. Also, RIM will hold another "port-a-thon" for developers today in which the company will pay $100 for any application successfully submitted to RIM's app store within a 36-hour period.