How to best use money loaded in Zaggle?

Hey guys

I get some money in my zaggle card every month. It can be used for meals.

Out of curiosity, I have tried adding paytm, amazon pay balance etc. but the txn gets rejected (for obvious reasons)

And now the money is incrementally piling up in the card as majorly other Credit cards help you reap better savings.

Are you aware of best ways to use that money?