I really don’t want to write out a word document on why it could be beneficial, but it’ll be cool to help other guardians with whatever activity they’re doing and you could get paid in currencies or rewards based on the time spent with the guardian (accounting actual progress into said activity) and/or beating said content.
You can see what that guardian is doing and decide if you want to join from a list on the screen, maybe even have a help-randomizer as a separate option if you’re feeling froggy
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The loot provided is the helps incentive.