Please, please, please do NOT sell the keys in the catalog. I have spent countless hours collecting keys and after opening 250+ crates without a super rare, I decided to trade my keys away. With keys being placed in the catalog, everyone with enough credits will have access to them. This would be bad for a few reasons.
I play roughly 30 or more JC games a day which gives me around 100-300 per game, depending on how focused I am on actually playing. I would have to play around 30 games a day just to collect ONE KEY. I don't even try collecting shells anymore because of how low the drop rate is and FW is out of the question because I'm completely sick of it from playing it constantly while it was the only minigame out. If keys are placed in the catalog at 10k a pop, I'd have to grind JC/FW just to get enough credits to buy a key which will probably only get me another piece of crate furniture. That is hardly worth it, not to mention my only source of income right now (the key) would be significantly harder to obtain and I'd be screwed. (On a side note, I've noticed that many other people are beginning to trade their keys away. I think the reasoning for this is because of how low the percentage of opening a super rare is. People are getting tired of opening crate furniture so have opted to sell their precious keys to try and get something that isn't up to chance).
If keys were placed in the catalog at 500 credits each, they would be much easier to obtain but I think that would go against the whole idea of the crate system. It's relatively easy to get 500 credits and which means the value of the key would plummet, everyone would have tons of keys and, consequently, tons of rares (hypothetically). While this would benefit me, it would benefit everyone else and everybody would have the super rares. Not that I would have a problem with this (I would actually prefer it) but I know a lot of people that would have a huge problem with it. On the other hand, people with a lot of luck opening super rares would have inventories full of them trying to trade them for ridiculous prices because of their rarity status on the original VMK.
To be quite honest, I think the crate system breeds greed and disappointment. I would do away with it completely if it weren't for the precious cargo inside them and the damage it's already caused. People who have benefited from the crate system are thriving while the rest of us are scrambling to keep up. The economy is unbalanced and removing the crate system might further increase the gap between rich and poor.
I'm getting so tired of this game revolving around the economy. Having to grind minigames all day just to keep up with the new release of items and to collect keys in hopes of opening 5000 crates to get a super rare is just ridiculous to me. The economy is not what this game is supposed to be about, yet this is what it's turning into. It's saddening and discouraging.