There is cause for concern with processing retries in bulk on a specific day. Processing all your orders as a single, bulk action could raise issues with your bank — potentially damaging a company's reputation in this regard.
Additionally, ReCharge rate-limits bulk actions, so orders need to be processed in smaller batches.
Churn Buster campaign setup ensures most customers have at least one retry within 48 hours of a pay period (for example, the 1st and 15th of any given month). This provides the benefit of bulk retries while conscientiously distributing retry attempts throughout the month.