Gamemode 4 RNG Scoreboard Concept

To Sparks:
I was thinking that since the Sunken Treasure module runs off a Pheudo Random Number Generator. It would be a appropriate to have a standard "RNG" score for any module running this. It would be quite benificial for many GM4 Modules! Including Sunken Treasure!
We can then have modules execute commands when a players' RNG score is a specific value!

The First Command Block:

/scoreboard objectives add GM4_RNG dummy
--Adds the score

The Second Command Block:

/scoreboard players add @a GM4_RNG 1
--This adds a score to all Online players an RNG score.

The Third Command Block:

/scoreboard players operation @a[score_GM4_RNG_min=100] GM4_RNG /= @r[score_GM4_RNG_min=2] GM4_RNG

--This is detecting whether or not any players with a score greater than 100 will have their score devided by another random player's score (This includes the player him/herself). Since this detecting off of everyone, the scores never surpass 100. When alone, it resets to 1, since 100/100=1. The more players the more random this value is, but players will never truely know the value anyway!

I tried tweaking it be any entity, but there's no "Select Random Entity", it would only select the closest (or furthest) entity and use that score :(