When you open Street Racers into the vertical portrait view go to Sponsors, which will be highlighted yellow, sitting below Real Estate, and above Police. Once you are in the Street Racers Sponsors make sure the Sponsors Offers button is selected at the bottom of the display. At the top of the Sponsors screen, it will list how many Street Racers PlayMesh Points you have. Below will be a number of offers where you can spend your Street Racers PlayMesh Points, such as on money or crew members. If you want one of these Sponsor Offers you press it, which turns it into a Confirm Payment button. Press this button and you will purchase the selected item for the stated number of Street Racer PlayMesh Points.