Interesting change for mercari sellers. From what I'm understanding the buyer now pays the payment processing fee. The seller pays no selling fees, but has to pay a $2 direct deposit fee.
They are also changing policy to allow returns for certain reasons (not as described, damaged in shipping) and Mercari decides the case. Can't tell if seller is charged a fee for the return service.
I don't see how this differs from before... at least my past experience as a buyer receiving a not as described item, I was allowed to return for a refund.
Sellers can also accept returns for any reason if they choose, but I think the reason so many of us liked selling on Mercari was the finality of the sale.
As a buyer I definitely don't like the fee changes...as a seller TBD.