Potentially big development, should this go anywhere.
Another person, u/Isthisyourpup, has come forward stating that Dan held a long-distance repoir and groomed her in 2016-17, while she was 17 years old living in the UK. Alongside this, said user was also asking for confirmation on the year Ashley started dating them, so as to make sure Dan wasn't fucking Ashley on the side while he was still in a committed relationship.
Immediately people called bullshit, as you do, and asked for receipts.
While no receipts have been publicly posted, they have been shared with subreddit mods u/TheValkuma and u/EatSomeEggs, as well as from resident archivist and lurker u/NotBlarg. And from all of their accounts, these receipts were damning enough and provided enough information that it completely confirmed the story in their eyes. If anyone wants to play liaison to try and verify the legitimacy of the text/receipts, she has open DMs and is sharing with anybody who asks in the Reddit thread.
Simultaneously, this new development also brought to light this
Dan fan blog that was partially the reason for more and more people starting to come out about Dan's allegations again on the RantGrumps subreddit, which it seems we MAY have missed.
This girl also apparently got chased out of the fandom after posting this, according to u/SpecialAmphibian6.
Take all of this with a grain of salt, as this is all still he said, she said tit-for-tat bullshit for now (save for the blog), but if this ends up being true and the receipts leak: then HOO BOY, we could have another Ryan Haywood situation on our hands from just how much Dan's pumped and dumped these girls, while using his nice guy persona to take advantage of them.