It's my experience that the bank will give up against a motivated chargeback counterparty.

My experience with ebay (stolen credit card) in particular was that things were going well until e-bay sent their stack of paperwork to my bank. Then my chargeback was reversed and shortly after that even my bank account was closed.

So you're not in the clear once you get your chargeback back. That is done initially while they give the other party time to respond. I think it took 30 days or so for ebay to bury me in paperwork, get the chargeback unwound again, and their schpeel was so effective that my bank themselves then accused me of being the fraudster.

As for

> The bank ate the loss for the fraud

I'm not 100% that's true. The entire reason why the chargebackee wants to contest it is because either the chargebackee or the chargebacker is eating the loss. The bank isn't eating that loss. There is no way E-bay would have bothered contesting my chargeback and paying their white collar workers for professional time researching if the bank was just going to eat it.