Well, we won't be transferring the entire petpurses to the vet's office, but I for one will definitely feel much better knowing that if something happens...at least (some) of the money set aside for them is already at the vet's office.
There are lots of people (myself included) who do not use credit cards under any circumstances. I don't like them, and never have. lol So while a credit card would be easier for some, for others it isn't an option. I think I get more mail from Visa and Mastercard than I do from anyone else.

You'd think they would give up by now...lol!
In any case, no, they don't pay interest, granted, but I still think it is a very good idea, especially for people who have 'issues' keeping money where it
should be, being saved for their furbutts.