I'm wondering if it would be possible to use this to make estimated tax payments, since the fees for using a debit card are so low.
I was wondering the same. Also, in our suburb, water, sewer, gas and electric are all billed separately and I pay them with ACH transfers though I know a few do accept debit...but none credit. Have been spending thousands $$ in utilities and leaving potential rewards on the table each year. Might be worth looking into to at least get something out of those otherwise non-rewarding transactions. Something is better than nothing.
I can see a use case for this.