Citi Hilton HHonors Reserve Card $50 Statement Credit

Citi's offering a $50 statement credit (targeted) for adding an authorized user and spending $3,000 on the card by 3/31/2017.  While I won't be taking advantage (too many other spending requirements to meet) this is actually a decent deal if you don't have anywhere better to put the spend.

The card earns 10x points on Hilton spend, 5x on airfare and car rentals, and 3x everywhere else.

Even if all of your spend is unbounded (unlikely) you'd be earning 9,000 Hilton HHonors points and $50.  I value the HHonors points around .6 cents/point so you're getting $104 in value from $3,000 in spend.

That's a roughly 3.5% return.