My best referrals at the moment are:
American Express Card - spend 2000 - get $250, no annual fee.
Feature Card(similar to cash app) - offers up to $150 cash back on NYC Subway in May 2023.
$15 bonus
100% cashback on NYC Subway rides in June(max $150, tap/OMNY only) and bonus cash back on environmentally friendly businesses including public transportation, thrift stores, green energy