[FIXED, Minor] Potential rewards in leaderboard & in profile don't match

- The severity level

Minor

- Prerequisite(s)

Connected with a whitelisted wallet on desktop.

- Step(s) to reproduce (if apply)

Go to leaderboard screen.

- Actual result(s)

The potential reward (calculated locally in leaderboard) for each user doesn't match the potential reward fetched from contract (profile & in game).

- Expected result(s)

Potential reward is well calculated (surely a difference in precision)

- Environment

Brave browser on desktop connected with Metamask

- Screenshots