Well once the engine reaches the consumers hands, the sound file can be downloaded to a computer and distributed by way of the internet even if Atlas doesn't make their files public. This is assuming that Atlas doesn't have a modified PS3 board/firmware that does not allow the sound file to be downloaded with the normal Consumer software package from MTH.
I highly doubt that Atlas will modify the board/firmware to prevent the sound files being downloaded. It is very nice and convenient to have all the PS2/PS3 files on MTH's website.
I am keeping my fingers crossed that those who work at Atlas will see this and decide to do the same thing that MTH has done for their customers.