What does 10 copy incentive mean?

I recently preordered a comic book and in the title it said (10 Copy Incentive) can someone explain to me what this means? or:I recently preordered a

I recently preordered a comic book and in the title it said (10 Copy Incentive) can someone explain to me what this means?

or:I recently preordered a comic book and in the title it said (10 Copy Incentive) can someone explain to me what this means?

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