OpenRouter's fee-change announcement shows why a simpler pricing formula can still affect customers differently. The announcement, originally dated June 9, 2025, sets non-crypto purchase fees at 5.5%, with a $0.80 minimum. Its examples show a $25 purchase falling from $1.67 to $1.38 in fees, while a $5 purchase rises from $0.61 to $0.80. A $1,000 purchase also rises, from $52.98 to $55. The effect therefore depends on purchase size: the minimum dominates small purchases, while the percentage determines larger ones. These are comparisons from the announcement.
