>>2429042I wouldn't exactly say they're sex icons, but the original creators of the more popular AUs definitely know about the porn - and they either don't care, are no longer interested in undertale in general, or have disowned the AU for the fandom to do with as it wishes. The underswap, underfell, and swapfell creators all allowed fanmerch that follows Toby's original fanmerch rules, though.
That said, apparently the honeymustard doujin might be getting a second printing according to a tweet from last month on the twitter account that was used to advertise it.
