It seems strange that the chart I looked at says that for 4th/5th/Q/F matches the losing side doesn't get anything....but the losing S/F teams get £450,000 each and the losing finalist gets £900,000....Why nothing for the next three rounds ?
The consensus seems to be they just haven't announced the figure for losing yet in the next few rounds. It would be hugely unfair not to pay the other participating club something. We will find out soon enough.