[Al-Khwarizmi]

I would swear that I was told that a few years ago by someone who managed a journal, but indeed from some Google searches it doesn't look like it's true.

I guess they probably said something else and I misinterpreted. Perhaps they said that getting indexed cost them money in an indirect sense, e.g. because it required more frequent publication and they had to spend money to achieve that, or something similar, and I thought they meant that they had to pay the indexing company.

Sorry for the confusion.