Fuggs' is right on this. She'll be making pennies whether or not she opted out of the class action, and, knowing her, she'd just get screwed over by her own lawyer. She isn't the best judge of trustworthiness.
It seems to me that the places that are most likely to be cash only are also the ones that already have a limited clientele, at least in my personal experience.
Even for those places that don't want a paper trail, the fees to credit card carriers often make credit cards and in-network debit cards not worth the hassle.
I would assume. Given that larger denominations are most likely to be deposited rather than cycled back out from a business register, it would make sense that those two denominations offer significantly more liability to the business.