It is time for another Deluge of Numbers in the Arena post.
A while back I did an analysis
comparing standard and uncollected arena crystals. Based on that analysis I concluded that the data supported the notion that the value of the two crystals, exempting the Punisher rarity, was identical: the UC crystal cost five times as much and dropped rewards that were scaled up by five times. However, that was not enough data to do more than estimate what that actual value was. The crystal states the drop rates for the different types of drops - gold, units, etc - but does not state the breakdown for the different values of each - how often the low gold drop vs the high gold drop occurs. To do that requires a lot more data.
Since February of 2020 I've been recording UC crystal openings individually and I now have 2000 individual drops recorded (this does not include any of the 2019 data, by the way, for technical reasons), which let me estimate the internal drop rates of the different types to moderately better accuracy. Here's a summary of that data:
2000 UC crystals
1685 Gold drops
300 Unit drops
8 Punisher drops
7 Energy Refill (x5) drops
The crystal states its drop rates as:
Gold: 83.98%
Units: 15%
Energy: 0.35%
4* Punisher: 0.65%
5* Punisher: 0.02%
My data is pretty close to this and within the margin for error: 84.25% gold, 15% units, 0.4% 4* Punisher, 0.35% Energy. Here's the deeper breakdown not listed by the crystal:
Gold:
15k: 985/1685 (58.46%)
25k: 419/1685 (24.87%)
50k: 281/1685 (16.68%)
Average Gold per Gold drop: 23,323 gold
Units:
75: 194/300 (64.67%)
225: 106/300 (35.33%)
Average Units per Unit drop: 128 Units
If we accept the Kabam stated drop rates for the crystal, we can then use the breakdown numbers to calculate the average value per crystal. It is 83.98% x 23323 gold + 15% x 128 units = 19587 gold + 19.2 units. This is pretty close to my original estimates for gold, and slightly higher for units, which is not too surprising as most of the drops are gold, so the earlier gold numbers would have been more accurate than the unit numbers. If we divide these by five, we get the average value of the standard arena crystal: 3917 gold and 3.8 units.
Some trivia:
Longest streak of just gold drops: 28
Longest streak of just unit drops: 4
Highest non-trivial density of unit drops: six of eight and eight of thirteen drops
Best batch of 100 openings for gold: 2,586000 (with 20% gold boost)
Best batch of 100 openings for gold: 2,235,000 (without 20% gold boost)
Worst batch of 100 openings for gold: 1,520,000
Best batch of 100 openings for units: 2850
Worst batch of 100 openings for units: 900
Average gold drops per 100 during 20% gold boost (normalized to remove 20% boost): 1,961,415
Average gold drops per 100 outside 20% gold boosts: 1,967,201 (so, basically the same)
Maximum "rare drops" per 100: 3 (one 4* Punisher and two energy in one batch, three 4* Punisher drops in another)
Number of drops to go before odds of 5* Punisher showing up at least once would have been 50%: 1465
What does 2000 Uncollected Arena Crystal openings look like?

Something like that.