$50 from Chase : Ink business card

https://www.chase.com/ccp/index.jsp?pg_name=ccpmapp/smallbusiness/business_banking/page/business_exclusives

Terms:

5,000 bonus points after first purchase redeemable for $50 cash back

You will qualify for and receive your bonus after your first purchase/first use of the card. First purchase/first use includes purchases, balance transfers, or any checks that are used to access your account, and excludes cash advances. After qualifying, please allow 6 to 8 weeks for bonus points to post to your account. This one-time bonus offer is valid only for first-time cardmembers with new accounts. Existing cardmembers/accounts are not eligible for this bonus offer.