The Citi Rewards+ Card gives 5 points per $1 spent on restaurant purchases (up to $6,000 in the first 12 months), 2 points per $1 spent at supermarkets and gas stations up to $6,000 spent per year, and 1 point per $1 on all other purchases. Citi Rewards+ points also get rounded up to the nearest 10 on every purchase. So a cardholder who makes a $1 purchase will get 10 points, for example. Plus, Citi Rewards+ offers a bonus of 20,000 points for spending $1,500 in the first 3 months.
Once you earn Citi Rewards+ Card points, they will never expire, and there's no limit to the amount that you can earn. However, you will lose any unredeemed points if you close your account or Citi closes it. You can redeem your points on the thankyou.com website (since these are Citi ThankYou points) by logging in with your Citi account info and choosing the redemption option you want.