Dan has been a well-documented sleaze for a while now, something he himself has admitted to on the show on several occasions. Like, it blows my mind how many people are surprised he's a pump and dumper when it's been an important talking point whenever he brings up his mental health issues.
This is still a nothingburger that has somehow yet again prevented people from looking to closely at Arin, who by multiple accounts is worse (not on the sex front, just other things like potentially charity fraud).