The only exploit was that there were not gralats being purchased as much because there was the option to exchange your 20k upload for 10k worth of new items at nexus.

I predict that the next 'fix' will be to remove the resale of furniture at half price.

This is fine. You can do that. But you should warn the players first. Let them get a fair shake instead of acting like cash hungry thieves and sneakily changing the system without prior intimation. Just like the other systems that have been brutally slashed this way.

HOWEVER
This change to uploads will have the opposite of the desired effect, instead hurting and not helping sales as I've already stated... purely because fewer people will buy uploads (if you can't refund it, it's exactly half as enticing) and because fewer people will buy uploads, there will be fewer gralat packs purchased in order to buy uploads.

The people who buy packs on impulse at limited time events will not just suddenly pay more because they don't have uploads to cash in. They will still have the same budget.
In fact, if you look at it from a point of view where more players buying more items creates 'inertia' in the system (oh hey, that's a cool mount, where did you get it?) you will see a drop in players purchasing items overall.

Don't get me started on that dumb move to rotate stock in the hat stores lol