That's a big deal. Do you have any source for that? (I couldn't find it in the ones you linked). This is great for humanity as a whole, but... poor grad students who now need to rush to publish their papers even sooner.
Data from all of Roman’s surveys will be made public as soon as it is processed, with no periods of exclusive access.
To your question specifically, in such a scenario they would charge an obscene amount for the bandwidth so you would be strongly incentivized not to download hundreds of GB of data from them.