What’s your score?
Did you actually read the post?
Activity% is f(Score, Time Alive).
For fixed time alive (say, 15 minutes) and assigning Activity% to the Y axis and Score to X axis, it assumes a logistic curve shape.
Also, respawns affect it. Perfect data can only be obtained through one-death leaving.
If someone got me their Activity% for…
1 minute alive
5 minute alive
10 minute alive
20 minute alive
With 200, 400, 600, 800 and 1000, 2000 score, ideally at least 3 or 5 times per entry (so, 4 time data points, for each assigned 5 score data points, 5 independent measurements of those coming up at something like 100 data points) - one could give you a graph that’s made for ground RB.
Key point: SINGLE LIFE, NO RESPAWNING. ODL. Respawning skews and introduces yet not rigorously understood effects.
Unfortunately, I only have data for ARB and ASB.
ARB data:

Activity% is represented on the data points.
If the above is approximated,

The above graph can be obtained.
For ASB, we fix play time to 15 minutes (900 play time) and obtain:

(the sheet with the data: HeliBoys Sim EC Sheet - Google Spreadsheets)
X axis is score, Y is is activity%.
GRB’s formula is different for what Activity% corresponds to what f(Score, Time Alive). See above for the data that would enable us to create a graph for GRB as well.
RP for activity for AAB, ARB, NAB, NRB, GRB, GAB follows the following formula:

For GRB, coefficient is 0.71.
For RP multiplier, if you have premium vehicle or premium account do NOT include Skill Bonus. Skill bonus acts on the formula without premium multipliers. giving you a separate clump of RP.