Ive never used such services before because there is a "fee".
However, I recently revisited the idea and it seems it MAY make sense.
I observed they charge a $3.60 fee to charge your bill to your credit or debitcard.
Typically, that $3.60 is more than my 1.5% cashback so Ive never done it.
However, I noticed that one can pay up to $600 which changes the dynamics.
If I pay $600 plus the $3.60, I get $9.05 cashback. Deduct the $3.60 and I gain $5.45 AFTERTAX for prepaying $489.
My regular bill is $111 this month and its likely I will spend the other $488 in the next 3-4 months.
So, 1.115% for overpaying for 3-4 months.
Beats any savings or money market account for sure.
The only thing I havent tried is if their system will let me overpay. It let me enter $600 but not more. However, I didnt go through with the transaction.
What do you think ?