Reply To: Spark

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ramonpontes
@ramonpontes

Sparks are used to promote bots on the barracks.

Note that promotion is different from upgrading. Upgrades increases the status of your bots. Promotions provides bonus that will increase your score on spark runs and on events.

Each level of promotion gives +5% bonus, and the maximum bonus due promotion is 140%.

EDIT: moifirst already posted a more explained information about this.