> They also contractually forbid merchants from taking actions that could make the fee more apparent to consumers

Has this changed over time, though? I often see a lot of brick-and-mortar merchants advertising different prices for cash/debit vs. credit. I probably see it most often at gas stations, but I see it in regular retail stores and restaurants sometimes as well. I moved to a new house earlier this year and even the movers offered a lower price for cash.