New applicants to American Express Blue Cash Preferred Card will receive a $150 cash bonus after spending $1000 within the first 3 months of membership. Further, you can recommend friends and if they are approved, you will receive a $75 bonus per referral. Earn 6% cash back at supermarkets, 3% at gas stations and department stores, and 1% on all other eligible purchases. Offer available to first-time members only. Allow 6-8 weeks for referral bonuses.