In order to assist new and current players, I would like to suggest a stackable multiplier for RE and Silver during games which a player faces a higher BR than that of their current gear.
----These values are not the exact proposed values, just an example----
Let us say each +BR gives a multiplier of +50% to all earnings. This would mean that if a BR I player fought BR III, they may perform worse in the match but also have a total of 2x +50% to their original earnings, essentially doubling that which they earned (it can also be a +50% to original, then a +50% of the new value for a higher bonus, etc etc). On the contrary, BR III players may fight BR I players and have the highest chance of performing top in the match, but will only achieve standard earnings.
In a match where BR V is the top BR, BR III players will get 2x +50% whilst BR IV players get 1x +50% and BR V players get standard, etc.
I encourage further discussion. The above is merely an example and is guaranteed to be highly flawed.