I have a Business Gold Card referral available:
50,000 Membership Rewards Points with $5,000 spend over the course of three months.

Earn 4x MR points on two of the below categories each billing cycle:
Airfare purchased directly from airlines
US purchases for advertising in select media
US purchases made directly from select technology providers
US purchases at gas stations
US purchases at restaurants
US purchases for shipping

$295 Annual Fee