I recently renewed a domain and was pleasantly surprised to see that payments with Bitcoin got a 3% discount.
As 3% is a common credit card fee for merchants (in my country they charge up to 7-9% approx.), so this is only a logical consequence that a Bitcoin payments saves this fee for them. But it's the first time I saw that as long as I remember. To be fair, BTC was not the only option with a discount, stablecoins and bank transfers were rewarded too. Which is also understandable.
Did you folks get some sort of special offer for a Bitcoin payment? Poll is online

I could even imagine larger discounts in some cases if merchants realize that at least some tech-related merchants could attract a loyal customer base. Above all if they accept Lightning, Ark or any other layer-2.
Merchant adoption of Lightning and Bitcoin in general would be huge, I think. We can forget about Saylor if this type of adoption continues

Speaking from personal experience, using Lightning to accept payments isn't as simple and user-friendly as it seems. If you want to run a real business and accept crypto seamlessly, using a crypto gateway is the superior choice.
For instance, through a gateway like Cryptomus, I can easily set the Bitcoin billing rate slightly below the market price—and there's your discount. On top of that, gateways provide ready-to-use plugins and APIs, which is a major convenience boost for operations, alongside instant conversion features.
Ultimately, this allows any merchant to accept Bitcoin without needing any deep understanding of the crypto market