They may just be eating the cost.
The code is inactive though. It has nothing to do with who is likely to use it, but rather who is able to use it.It also seems a little strange that within a license they'd be able to ship all games with the IME and only have to pay royalties on the games that are likely to use them. In terms of whoever the royalties are going to, if a game is shipped with the IME, regardless of whether it'll be used or not, royalties should be due.