Board Thread:General Discussion/@comment-36624593-20180929021830/@comment-32182236-20180929130148

From what I know, he likely does see the AUs as an interesting idea, enough to approve of an Underswap AND an Underfell game (The ones being worked on by Team Switched, and by Team Primus, respectively), but he doesn't want people just spamming him with messages asking him to check out a certain AU. Odds are, he already knows about it, and you have no reason to advertise it to him.

What leads me to this conclusion? He's very similar about fan-games:He approves of them, but you can't sell them. And I don't think that many game designers at all want to get a bunch of advertisment messages asking them to play their new cool fangame, or check out their AU.