(For the Olympus crate)
I’m not a big fan of the change in cubit price. Now you are guaranteed to lose money on this crate as the cubit reward is now 3, instead of 4 (the key costs $3.75USD).
3 Iron golem spawners are one of the better rewards in this crate as they have a "Common" rarity and igs are very rare and can sell for 100k-250k mana each, so with 3 of them, you might be able to get your money's worth.
2x Pride keys is also a great reward because it has a high set value. (it won’t depreciate until the crate expires)
Rainbow kit is unique and permanent, although it comes at a high price for something a lot of people might not use.
Infinity chests sell for $16.25USD in the store so it would be a great reward if you wanted or needed one. However in-game they are not worth nearly that much because they are incredibly slow due to being bottlenecked by hoppers. Minions are far superior to infinity chests (but cost more).
The builder wand I suppose saves time but I'd rather spend an extra 10 minutes than $3.75.
2 legendary keys are a decent reward but chances are you will still lose money despite having 2 keys.
Dragon fruit bombs sell for 500 mana each so 64 of them would only be worth only 32 cents.
It's always a shame to see the 25k mana crystal because it’s only worth 25 cents (0.25 cubits at the standard rate of 1k mana per 0.01), so a huge loss in money. Keeping in mind, with a normal pickaxe, I average 950 blocks a minute. So in under half an hour, ANYBODY could earn this much mana.
I sell 100k XP for 15k mana so at that pricing the 400k XP reward would only be with worth 60c.
Sell multipliers go for a lot of different prices, however, it is never as much as 375k mana, so another loss in money.
The rank upgrade paper is decent value for the price of one key as a typical rank upgrade is worth $12.50USD. However, you will only have the rank in Olympus (at least that's how it used to be) and it will only last until the end of the season. Rather than buying keys I would recommend buying a permanent rank (assuming you don’t have one). And to those who received the rank upgrade paper and want to sell it, SELL IT FAST. Towards the end of the season, they will be worth next to nothing, and I believe they sell for a reasonable price right now anyway.
The bow and shield are both collectible items (I wouldn’t risk losing them in pvp) so they would sell at whatever they buyer is willing to pay.
The armor (in Olympus at least) is pretty much the same as previous crates but with different names. I would say these items are like the bow and shield and are only meant to be collected so their value depends on how you feel about collecting disposable Minecraft items.
The shovel (in my opinion) is stupid to have in the chest, because the fortune is useless if you're using it for dirt (which most people will), and it only costs 19250 mana to make yourself (not including fortune), which is roughly 20 minutes of mining. If you did happen to decide to add fortune, it would bump the cost up to 42650 which is still only 43 cents worth of mana. Even so, I would recommend spending that extra 23k mana on something other than fortune.
The sell wand, although it's limited, is good value due to the multiplier. I hope the sell wands in crates like these will always have a multiplier in the future.
The titles really depend on the player and as far as I know can’t be sold. If you wanted them then well done, if you didn’t tough luck.
Rainbow chat color is similar to the titles, a lot of people won’t use it because it’s kind of ugly and hard to read. A lot of people do want it because it’s a cool thing to have. Value really depends on the player who gets it.
All in all, you will most likely not get your money’s worth with this crate (like most of them). However, it was meant to raise money for various charities, which is a good cause and I think this should be done for all season crates. If the rewards were better, I think it would generate a lot more revenue towards the charities, because revenue for items like these are usually almost all profit (It doesn’t cost a lot to make the chest and it won’t cost much, or anything at all, to make the items better). I would rather donate the full $3.75 directly to one of the charities than spend it on a crate key, but that's just my perspective.
tdlr: The crate is a waste of money and you should donate directly to the charities instead.