I don't think that's ever proven to be the case, sounds more like something cynical that Reddit would do. If it were me, I'd rather focus on actual structural, backend improvements than entertaining the whims of users who want rainbow-colored buttons or dancing emoji. We are talking about utterly trivial changes here like nudging an element here or recoloring an element there. Individually, they are rather pointless, but in aggregate, it can be helpful for a user to dial things in to their liking via a centralized HUD. I still mod every site, game, and every piece of software I use to my liking, that's just the nature of the beast IMO. Incidentally, I think the owner of the site has been fairly encouraging and accommodating towards our cottage industry of modders!