I was there for his Tykables joke, I can explain the context for that.
During season 3 of Fishtank, one of the girls wore a big pink bunny ear hoodie, and mentioned to another contestant that she brought it because she has "an adult-baby-diaper-lover style", referring to her childish clothing.
Chat took this comment as evidence that she might be into ABDL, and started started trying to poke and prod her to see if she is.
At that point during season 3, the show runners were constantly doing fake ad reads for products, and Sam pretended to be doing an ad read for Tykables while in the room with the girl, with everyone focusing on her to see if she reacted in a way that indicated she knew what that company name is.
I don't think either of them are into ABDL.