They vary slightly depending on the brokerage and the specific exchange, but they're always fractions of a cent. (moneysense.ca)
Points are usable on a sliding scale, with most redemptions coming in at just fractions of a cent per point, scaling up to only 1 cents per point when redeeming 25,000 points or more. (pointsaway.com)
Stellar's open financial protocol allows for the settlement of transactions almost in real - time (3 - 5 seconds), for fractions of a cent, all in a secure and safe network. (bitcoinmagazine.com)