Of course, banks make a lot of money on pennies because of scale. None of this is new. I do agree that being your own bank is really smart, that's why I like D

Of course, banks make a lot of money on pennies because of scale. None of this is new. I do agree that being your own bank is really smart, that's why I like DeFi so much... it makes it super easy, without any impact on your credit score. That said, doing it at a small scale doesn't really seem like it is worth the hassle. $200 isn't worth the time or dings on your credit score. When I've done it before, other cards notice and also start to cancel you or lower your available credit as well. I have "excellent" credit (780+), a fairly large credit line across several cards (~$100k+) and I never get those year long offers for 0% (or anything less than current interest rates) any more. Those dried up years ago. I don't see how anyone is making this work.