I have about 3500 points, worth about 2 days in rental credits, at Enterprise that expire on 8/26 i.e. in a month from now.

How do I keep them alive beyond that date? Do they have any partners like Dining Rewards where I can make a purchase somewhere and earn Enterprise points to maintain activity in the account? I have no plans to rent a car in the next few months, so getting a rental from Enterprise is not on the cards. Thanks in advance for any suggestion!