I did confirm at least one store: 3% discount for BTC and XMR https://shopinbit.com/electronics/tablets-smartphones/tablet...
I'd still be a bit worried to use it to pay on a website that's not well known, as I assume you don't get disputes if the website doesn't deliver the service after you paid ^^
If you take away the "crypto services" and alike (600), you get around 700 businesses.
And to be honest, I like them a lot too because they're very fashionable and look great and are iconic. But I also don't want to spend $12k+ on a watch. And also in honesty, I always present it as a replica when asked about it and usually provide the above context where appropriate.
I have no issue supporting replica manufacturers because they always represent their merchandise as replicas, and I also have no respect for intellectual property and the ridiculous practices of legitimate manufacturers.
All this to say (admittedly defensively) that Monero is used often in buying replica watches.
A friend of mine has also used it to buy drugs online (which was sent to labs for testing before using).
I know youre getting frustrated with the vague responses, but that's really how it is, with all money, and Monero people are very hell bent on reminding anyone that asks about this.
You can check out https://monerica.com/ for a resource that lists services and goods and websites that accept it, not including the darknet ones, if youre into illegal drugs you'll have to find those yourself. Obligatory reminder that most illegal drugs are purchased with US dollars.