If you use and love Google's Fi, the company's own MVNO (Mobile Virtual Network Operator), why not spread the word? Refer a friend or two? You may have done that already, but from this point on referrals come with goodies for you. If you refer two people to Fi and they become customers (and stick around for at least 30 days), you will receive $20 in Google Play credit as well as $40 Fi credit. When you reach five referrals you will get a Fi weekender bag plus $100 Fi credit. The credit will come in around three weeks after the person you referred has been active for 30 days. The bags will...
Source: http://www.gsmarena.com/fi_referral_challenge_wants_you_to_race_to_google_hq-news-26411.php