Aside from the free PR, this seems like a bigger monetary win for Coinbase since they are the ones processing the bitcoin transactions, right?
depends what payment plan they are going in. coinbase has a 1% flat rate plan so that would be like $1,240 they made in a day, but they also offer 0% fees on the first $1million dollars worth of transactions with that plan, so in that would most likely mean they didn't make any money today from overstock.
also i remember overstock saying they paid 2% on credit card transactions so if they are using coinbase's 1% payment plan then i believe that means both any money coinbase makes is also the same amount in extra savings overstock gets, so its pretty equal on whos benefitting more.