With a totally non-tech head on, I imagine this is purely value. Some of our services are more value driven than cost and a very good analogy is something like Getty.
A photo that was taken 5 years ago might cost £10 to use for editorial, £50 for low res web, £100 medium res, £200 high res, £500 large scale print use, £1000 TV broadcast, etc. Same photo, same work that went into it, just a different resolution, file size and usage, all of which are minimal or no additional cost whatsoever. You're paying for value.
Totally get that, this specific data in infinitely more valuable real-time then even an hour old. But we are trying to work out a pricing model that is based on operating costs and not value to allow us to develop our market and clients, at which point market value is easy for us.